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Causes of enlargement of one testicle in a man

If one testicle is larger than the other in a man, the causes can lie in various phenomena, from safe to serious pathologies. In order not to worry about this, it is worth consulting a doctor. It is possible that this is just the physiological characteristics of the body.

When not to worry

Each man has his own testicle size standard. The average norm is 4-6 cm in length and 2-3 cm in width. Most often this is due to a genetic factor.

In addition, the size of the testicles may vary depending on the following reasons:

  1. If a person uses drugs. Doctors have long proved that this addiction directly affects the condition of the genitals. If you take drugs for a long time, then the testicles are reduced in size.
  2. Some medications and steroids affect the structure of male organs. For example, taking synthetic testosterone affects the main functions of the testicles, that is, their independent production of this hormone. As a result, this organ atrophies and decreases as unnecessary.
  3. Varicocele disease. The blood flow is disturbed, the testicle does not receive enough nutrition and becomes smaller than the other.

Before you panic, you should know that initially a man’s eggs are not the same size. Normally, one side is 1 cm smaller than the other. If these indicators are higher, then we can talk about hypoplasia, that is, when one egg is underdeveloped.

If the difference is small, then maybe it's just a physiological feature, in addition, as the body ages, a decrease in one of the testicles can be observed. This may be due to different blood supply to organs. If the reason lies in this, then you should not worry and nothing needs to be done either.

Why is one testicle larger than the other in men?

In most cases, in men, one testicle is larger than the other. The location of the organs is also not symmetrical - the left testicle is located below the right. If the difference is not significant - this is normal and is not a disease.

Let's see why this happens:

  1. The main reason for the unequal size and location of paired organs lies in their blood supply. The right organ is powered by the abdominal aorta, and its venous blood flow goes to the inferior vena cava. The left testicle is powered by the renal artery, and its vein connects to the renal vein. As a result, the circle of blood flow in the left egg is greater than in the right. Due to a slight stagnation of blood in a longer circle of blood circulation, an increase and omission of the left testicle occurs. For this reason, the left testicle is larger than the right.
  2. Also, the reasons why in men one testicle is larger than the other is explained by the features of intrauterine development. If a child has one testicle larger than the other, then there is no cause for concern.
  3. Often, why one egg is larger than the other in men is explained by the fact that with different heights of organs and differences in size, the ventilation of the scrotum improves, which is important for the spermatogenesis process.
  4. Many andrologists believe that one testicle is larger than the other in men and is slightly lower in order to exclude squeezing and trauma during movement and walking.

Important! The normal sizes of the testicles are as follows - the mass is in the range of 20-25 g, the volume is 13-20 cm³, the width of the organ is 25-35 mm, and the length is 40-80 mm.

Often a man is concerned about the question: which testicle is larger, right or left? It is worth noting that the norm for righties is the situation when the left egg is lower and larger. In left-handed people it happens the other way around - the right testicle is larger than the left and is below it.

Causes of large size deviations

If one egg is larger than the other in a man and this has appeared recently, and the difference in size of organs is significant, then this situation is a symptom of pathology. Too big right testicle occurs with the following diseases:

  • malignant tumor (this is very dangerous, so consult a doctor immediately),
  • at any age, a man may have an enlarged testicle due to inflammation of his appendage (in this case, sharp pain appears),
  • the egg may swell due to injury,
  • the inflammatory process in the body develops against the background of wearing tight underwear,
  • torsion of the testicle leads to the death of the organ, therefore, requires urgent treatment.

Too small sizes of one testicle are in such cases:

  • underdevelopment of one male sex gland,
  • varicocele (with varicose veins of the spermatic cord, the blood supply to the organ worsens, and it decreases in size),
  • cryptorchidism (if undescended one testicle was observed from birth, then even after it is lowered into the scrotum, the organ will be smaller due to a long stay in the abdominal cavity),
  • torsion of the testicle in the prenatal period or in infancy,
  • transferred orchitis is an inflammatory complication that occurs after a mumps, namely mumps,
  • organ atrophy is often observed with the use of anabolic steroids (against the background of a decrease in the size of the testicle, the production of male hormones and spermatozoa decreases).

When is it necessary to see a doctor?

So that a man can turn to an andrologist in time, he must regularly conduct self-examination of male testicles. It is better to do this after taking a bath or a warm shower. At this time, the scrotum is most relaxed, which allows you to touch the size of the testicles.

Home self-examination consists of the following steps:

  1. First hold the organs in your palms to assess their weight. If a slight difference in weight is noticeable, then this is considered a variant of the norm, especially if this difference has always been.
  2. On the testicle there can be no seals and neoplasms. The testicle shape is normally smooth, oval, without lumps. The organs themselves are elastic.
  3. It is important to examine the area of ​​the appendages that are located behind the egg. Normally, they are mild and painless.
  4. Feel the spermatic cord above the appendages. These are smooth hollow tubes without seals.
  5. The scrotum should not have dense venous nodular formations.
  6. The difference in egg height does not normally exceed 30 mm.

If during the examination a man finds a big difference in the size of the organs, their location or any neoplasms, this will serve as a reason for contacting a urologist. The same applies to the discomfort and pain that occurs during an examination at home.


As a medical certificate and statistics show, men who abuse drugs, especially marijuana, are faced with pathological changes in the genitals. Despite the fact that the disproportion of organs rarely carries risks and dangers, psychological discomfort makes itself felt. This affects the potency, damage to libido and sexual activity of men, including.


A number of potent drugs that hide side effects under themselves can adversely affect the size and condition of the testicles. Often, some drugs cause disproportion of the testicles, especially if they are hormonal drugs, anabolic steroids and other substances containing synthetic testosterone. This analogue of the hormone eventually leads to testicular atrophy.


Varicocele is a dropsy that tends to form in the field of male testes. The disease is characterized by a pronounced increase in the size of one of the testicles, which cannot go unnoticed. Doctors strongly recommend that you seek help at the clinic in a timely manner, since varicocele causes serious circulatory disorders that adversely affect the condition and functions of the genitals.


Any mechanical effects on the genital area can adversely affect local circulation and the supply of tissues and cells. All this is accompanied by hematomas, tumors and, accordingly, the imbalance of the testes of the man. It is important to visit a doctor immediately so as not to encounter complications after injuries to the inguinal region.


The inflammatory process of the epididymis is accompanied by a disproportion of the testicles. In turn, such illnesses as meningitis, pneumonia and flu can provoke epididymitis. Due to the inflammatory process, at first there is a compaction in the appendages, after which one or both testicles swells. Epididymitis requires timely treatment, as it involves serious complications.

What is this organ and why is it needed

Initially, it must be said that for men, the testicles are very important. After all, it is in them that sperm production occurs, which give the guy the opportunity to become a father. But they also produce such a hormone as testosterone. And he is responsible for the presence in the representative of the stronger sex precisely of male qualities.


Torsion of the spermatic cord is a rare but possible violation in men, which leads to impaired local circulation, nutrition with oxygen and the necessary substances of the genitals. All this results in the development of imbalance of the testicles, as well as in a number of other complications requiring corrective therapy.

The most serious reason that can cause an increase in the size of one or two testicles at once is the formation of a tumor.

Regardless of whether the neoplasm is benign or malignant, it will in any case affect the proportions of the testicles.

One testicle is larger than the other in men: causes for an increase in right or left

Male testicles or testicles are part of the reproductive system of the stronger sex. They are responsible for the production of sperm and sex hormones. Different men have different testicle sizes and weights. Often there is an asymmetric arrangement of organs, which is considered a variant of the norm.

It is also normal that one testicle is larger than the other in a man. This in no way affects the functionality of the sex glands and the health of men.

However, the abnormal location of the testicles, a significant decrease or increase in the size of one organ should alert, as it indicates health problems.


So why is one testicle bigger than the other in men? It is worth noting that this is provided by nature. Those. this condition is assumed anatomy. And all in order to prevent injury, kinking or rubbing of the scrotum in everyday life.

The normal size of the testicles is an average of four to six centimeters in length. In width, the size should be about two and a half centimeters. However, these parameters are not a standard at all. It all depends on the body of a man. The larger it is, the correspondingly, and its testicles will be larger.

However, this is normal if the differences are in principle insignificant. Otherwise, you need to consult a doctor.

Self inspection

We examine further why one testicle is larger than another in men. It is also worth mentioning that each man can independently detect the problem. To do this, periodically inspect this body. Procedure:

  1. Inspection is necessary in a calm state. In no case after physical activity or having sex.
  2. Visual inspection: you need to stand in front of the mirror and compare the sizes of both testicles.
  3. It is also important to consider their color. The testicles should be the same color.
  4. Next, in turn, each testicle should be raised to the inguinal region. Here you need to trace whether there is pain.
  5. At this stage, each testicle should be slightly squeezed. This will also indicate whether there is any pain.
  6. The last stage: you need to push several times, as if urinating. If there is pain, this is not a good sign.

Why is one testicle more than another in men: causes, treatment methods

The testicles (testicles, testes) may be of unequal size. If a man has one testicle larger than the second by a maximum of 20 mm, then this is the physiological norm.

In newborns, the genitals are only forming, so they can have different sizes.

However, when one testicle is enlarged 2 or more times in relation to another, the patient begins to worry about pain - this is an occasion to visit a doctor to diagnose and start treatment.

The testicles are an organ that is located in the musculoskeletal sac, or scrotum. In the normal state, one testicle is larger than the other, due to several factors:

  • The right and left testicles have different circles of blood circulation. Normally, the artery departs from the aorta of the testis, and it is possible to depart from the mesenteric or renal artery.
  • Depending on whether the man is right-handed or left-handed, the corresponding testicle experiences a greater mechanical impact. When walking, a person strides with his right foot more if he is right-handed, and with his left - if vice versa. So that the testes do not rub against each other, they have different sizes.

According to given numerous studies, the right testicle is larger than the left.

The structure of the testicles has a number of characteristic features:

  • the testes may vary slightly in size,
  • permissible location of testicles at different levels,
  • the average weight of one testicle is from 32 to 50 g,
  • the size of the testes reaches from 2.5 to 3.7 cm.

There are a number of signs that require you to immediately consult a doctor:

  • testicles increased sharply in a few days,
  • the shape of the scrotum has changed,
  • there are symptoms of inflammation - redness, swelling,
  • increased local, general temperature,
  • pain when walking a man
  • during the act of urination there was discomfort, pain,
  • a rash forms on the scrotum
  • the presence of blood in semen.

Doctors identify a number of reasons for which deviations in the size of the testes are possible:

  • Drug use. In this case, the genitals atrophy and different sizes of the testes appear.
  • Prolonged physical activity with the use of anabolics, steroids change the size of one of the testes.

An increase in testicles is not an independent disease, but indicates serious diseases in the body. Common pathologies in which one testicle is larger than the other in men:

CauseDescriptionA photo
Testicular torsionA disease in which the spermatic cord is wrapped. In this case, blood circulation stops, testicular cells are affected. Symptoms of the disease:

  • torsion is accompanied by pain,
  • the color of the scrotum changes to bluish or maroon,
  • signs of intoxication appear - nausea, vomiting, weakness, migraine, fainting, and others
InjuryWith closed injuries, internal hemorrhage forms, which leads to an increase in the testicle. In addition to changing the size of the testes, the following symptoms appear:

  • depending on the amount of blood spilled, the color of the scrotum may be blue, black,
  • hemorrhage can spread to nearby organs, tissues - pubis, penis, groin area,
  • signs of intoxication appear - nausea, vomiting, migraine, dizziness, cramps, loss of consciousness
TumorsDoctors distinguish two types of neoplasms that can lead to a change in the size of the testicle:

Cancerous neoplasms - a slow-growing tumor,not causing pain, discomfort during palpation.The first sign in which the patient goes to the doctor is an increase in the testicle 3-4 times compared to the second. With the timely help of doctors, the prognosis is favorable, the patient is completely cured.With a malignant formation, metastases can spread to the bones, lungs, brain, and so on.Benign tumors in the testes, or cysts appear behind the testicle, in rare cases, in the front. Doctors have not fully studied the causes of their development. Signs:

  • palpation pain
  • edema,
  • violation of the act of urination caused by an increase in the lymph nodes that compress the ureter
VaricoceleThis is an extension of the spermatic vein or other branches within the scrotum. With the disease, testicular ischemia occurs due to stagnation of blood. The left is more often affected, which is associated with the anatomical location of the ovarian vein. At risk are men who engage in heavy physical activity, having diseases of the renal veins. Symptoms of varicocele:

  • there is a pulling pain in the scrotum, aggravating during physical exertion,
  • it hurts a man to sit
  • the size of the testes changes.

During the examination, the doctor may notice swelling of the veins that disappear when lying down

HydroceleA disease in which fluid collects in the scrotum. The causes of hydrocele are not fully understood by doctors. However, they came to the conclusion that dropsy develops as a result of an infectious process, trauma, and surgery. One testicle can increase in size by 10 times or more. The following symptoms appear:

  • there are unsharp pain
  • inconvenience while walking,
  • the act of urination is disturbed.

During the examination, the doctor diagnoses an elastic, dense formation that is visible

EpididyimorchitisDoctors distinguish two types of disease:

  • non-tuberculosis, or orchitis,
  • tuberculous.

  • swelling of the testicle, appendages,
  • palpation pain
  • problems with urination
  • discharge from the urethra.

The disease is difficult to diagnose, as the symptoms are difficult to distinguish from the tumor. Tuberculosis is less common. It is a solid edema of irregular shape. With pathology, the movement of the testicles inside the scrotum is difficult

Infectious and inflammatory diseasesThe causative agent of pathology penetrates the testicles and their appendages with the flow of blood from the site of infection. As an independent disease is rare. Pathogens can cause an increase in fungal, viral, and bacterial nature:

  • paramyxovirus, or the causative agent of mumps,
  • herpes virus
  • flu virus
  • pathogens of sexually transmitted pathologies - gonorrhea, syphilis, etc.

The infection is introduced through the urethra, bladder, prostate, possibly through the scrotum after surgery. Symptoms of infections:

  • an increase in half of the scrotum, which is accompanied by pain,
  • skin tightness, lack of wrinkles,
  • edema,
  • symptoms of intoxication - high fever, migraine, general weakness and others
Pathogens causing enlarged testicles

In the first trimester of pregnancy in a child, testicles are laid. This process develops in the abdominal cavity. If the baby was born on time, then the testicles descend into the scrotum.

In a premature fetus, the testes are located in the inguinal canal and eventually occupy the desired position. For various reasons, the omission does not end at the time of birth.

This anomaly is called cryptorchidism, it is diagnosed during the initial examination of the newborn.

Doctors distinguish such a concept as false cryptorchidism: the baby's testicles are mobile, so they are able to hide from the cold, muscle tension in the abdominal cavity or inguinal canal, andBecause of this, their size may not be the same. Soon they are returning to the opposite position. In adolescents, the pathology disappears.

There are a number of diseases in which a boy has one testicle less than another:

  1. 1. Dropsy. In the membranes, fluid accumulates and lingers, the entire scrotum or half of it increases. The child needs constant supervision by a urologist. Up to a year, all symptoms disappear. If the edema does not subside, but increases, then after 2 years the child is shown surgery.
  2. 2. Hernia. Life threatening disease. The disease leads to the death of testicular cells. The only way to deal with it is an operation that is carried out in the first days after birth. Pathology can be detected visually: with a baby crying, screaming, physical exertion.
  3. 3. Torsion. When the testicle is twisted, the child feels severe pain, becomes moody, refuses food. If assistance is not provided in a timely manner, then the testis is damaged, and after a day the changes become irreversible. The only way to get rid of the pathology is surgical intervention.
  4. 4. Atrophy. It develops after infectious diseases.

TreatchildIt is possible only under the supervision of a doctor. Self-medication is inappropriate.

After diagnosing the disease, the doctor proceeds with the correction methods:

  1. 1. Injury, torsion. The patient is shown bed rest. It is recommended to apply ice to the affected area, which helps relieve swelling, pain. The patient will have to wear a bandage. If the bleeding is massive, then the person is shown emergency surgery.
  2. 2. Malignant neoplasms. Depending on the stage of the pathological process, the doctor prescribes surgery (removal of the affected testis), radiation or chemotherapy to reduce the risk of relapse.
  3. 3. Infectious and inflammatory diseases. The treatment regimen is prescribed after determining the pathogen that caused the changes. With viral pathologies, antiviral drugs are indicated, with bacterial pathologies - antibiotics. Additionally, non-steroidal anti-inflammatory drugs are prescribed for a man to relieve swelling, temperature, and pain. After stopping the pain, the patient is sent for physiotherapy.
  4. 4. Hydrocele. With dropsy of a small size, no medications are required, the pathology goes away on its own. If the dropsy did not pass, the patient is punctured with the affected area, sclerotherapy is carried out - the introduction of drugs that cause the walls of the vessel to stick together.
  5. 5. Varicocele. Medications do not give effective results. A man needs surgery.

Elena Vasilievna Malysheva recommends self-examination of the testicles in order to notice abnormalities at the initial stage and timely proceed with treatment:

  1. 1. The procedure is carried out in a calm state.
  2. 2. A man stands in front of a mirror, examines the testicles for changes in size, color.
  3. 3. Each lift, squeezing a little.
  4. 4. A man pushes several times, as in an act of urination.

If the color of the scrotum has changed, one testicle is several times larger than the other, an urgent visit to the doctor is required for diagnosis.

Doctors highlight simple prevention rules that prevent the development of diseases that lead to an increase in testicles:

  • use a condom during intercourse,
  • with active physical exertion, put on a protective bandage on the penis,
  • avoid scrotal injury
  • if there are diseases of the genitourinary system, consult a doctor,
  • observe the temperature regime in the groin area.

Diseases that lead to a change in the size of the testes can provoke infertility or necrosis with subsequent amputation of the testicle. Therefore, when unpleasant symptoms appear, you need to immediately visit a doctor to diagnose and start the treatment regimen.

Different testicle size as a symptom

If a different testicle size is considered normal, then it corresponds to the following indicators:

  1. The difference in size is minimal. That is, when one testicle decreased only a few millimeters.
  2. A similar difference has been recorded since birth.

But if the changes occurred suddenly or within a few months, then it is worth considering why this could happen. It is better to immediately seek help from a doctor.

To find out the cause of this condition, some research will be needed. Most often, the 2 most common diseases are detected as a result - hydrocele or varicocele.

Another name for hydrocele is dropsy of the testicle. The disease is present from birth or develops throughout the life of a man.

With the appearance of dropsy from birth, we can talk about a congenital anomaly in the child's genitals. It is not difficult to get rid of it, in some cases this is considered the norm.

If hydrocele appears at an older age, then we can talk about the injury to the male reproductive system.

Another varicocele disease is characterized by an enlarged testicle due to dilated veins in it. In the absence of proper treatment, male infertility develops over time.

The outflow of blood is disturbed, the testicle does not receive the necessary nutrition and ceases to function normally.

In such a squeezed state, the local temperature changes its parameters, becomes higher, as a result of which sperm production stops.

Another common cause of testicular size changes is trauma to this site. The tissues are impregnated with blood, and one of the testicles changes its size. A dangerous circumstance is the risk of bleeding.

How to conduct a self-examination

Before you go to the doctor and find out why one testicle is larger than the other, try to examine yourself.

Initially, take a warm bath or shower, so the scrotum will relax, it will be easier to examine it. After that, palp each egg for differences between them.

If the mass of the first egg does not exceed the mass of the second or only slightly different, then everything is in order.

Next, palpation of each testicle is performed, it seems to roll in the fingers, so you can feel for possible neoplasms in the organ.

In normal condition, each testicle will correspond to the following indicators:

  • has an oval shape
  • resilient but non-solid
  • the surface of the egg is smooth without lumps,
  • the appendage (the back side of the upper part of the organ) is soft to the touch,
  • the spermatic cords on the back of the testicles have a smooth and resilient structure, ducts can be felt.

If seals or neoplasms have been identified, then you should not hesitate to go to the doctor. The testicles can not only vary in size, but also be one below the other.

This is due to the fact that one testicle (left) feeds on the artery from the abdominal aorta, while the right one receives power from the diaphragmatic, adrenal, renal or mesenteric inferior arteries.

Therefore, most often the left testicle is better supplied with blood than the right. Thus, when one testicle is larger than the other, this is normal.

Sometimes you can confuse an enlarged testicle and an enlarged scrotum. If the scrotum is enlarged, then the eggs do not change size. A man can not always cope with this task on his own. Therefore, the help of a doctor is needed. The exact results will be clear after an ultrasound scan.

An enlarged egg rather than a scrotum may indicate a tumor in it. It can be either benign or malignant in nature.

With testicular cancer, the surface of the organ acquires a dense and tuberous structure. At first, the man does not feel pain. The disease is often diagnosed by chance.

Therefore, it is recommended that if an increase in one of the testicles is detected, consult a doctor immediately.

The pain appears as the tumor develops and the spermatic cord reaches it, as nerve endings pass through it.

In rare cases, a tumor forms immediately in two testicles. But there are times when oncology resumes several years after successful treatment.

Testicular cancer proceeds in the same way as other malignant neoplasms, with the growth of the tumor, it begins to metastasize to neighboring organs. Symptoms appear depending on the site of damage to the internal structures of the body.

Orchitis - inflammation of the testicles

This disease is characterized by an inflammatory process in the testes. Symptoms of orchitis:

  • fever
  • a small amount of sperm comes out at the time of ejaculation,
  • the presence of acute pain
  • pain radiates to the inguinal and lumbar region.

The disease has an infectious origin. Not only genital infection can affect the development of orchitis, but also diseases such as bronchitis, pneumonia, tonsillitis, influenza, measles, herpes, etc.

In some cases, the disease develops after injuries, impaired blood flow in the pelvic organs, which leads to stagnation in the reproductive system. As inflammation spreads in the testes, damage forms.

Treatment includes anti-inflammatory therapy and pain medication. Physiotherapy is also effective, which consists mainly in actions such as electric current treatment and reflexology. Massage in that case is not applied. In advanced cases, hospitalization is indicated, often surgical intervention is used.

It can be concluded that the causes of enlarged testicles in men can be from completely harmless to serious pathologies. Only a specialist can determine this.

One testicle is larger than the other in men.

The problem in men, when one testicle is larger than the other, can be either a false alarm or an alarm. First you need to find out the reason for this increase and at the same time seek medical advice.

Two reasons can explain why one testicle is larger than the other: either it is the physiological characteristics of the body, or a symptom of a serious disease.

If the cause of the enlarged testicle is a tumor

It is necessary to distinguish between an enlarged testicle and an increase in the size of the scrotum. In the second, testicular volumes remain the same. However, it is difficult to independently distinguish between these processes, therefore, it is recommended to seek medical help. Accurate data can be obtained through ultrasound.

If the examination showed that the egg was enlarged, and not the scrotum, then this can be a signal of a serious disease - the development of a tumor (both benign and malignant).

If a man has testicular cancer, then its surface becomes dense and tuberous. The first stages of the disease can be painless. Doctors say that very often testicular cancer is detected by chance, the patient can only complain of an increase in paired organs on one side. Pain occurs only when the cancer has reached the spermatic cord, and its elements are nerves.

A tumor can very rarely appear simultaneously in both testicles. However, it may reappear in a few years.

The pattern of development of this disease differs little from cancer of other organs. Testicular cancer can produce metastases. They are accompanied by pain in the places of their deployment, cough, hemoptysis or shortness of breath.

In this case, an independent examination is considered a good preventive method.

A little bit of anatomy

Before looking for answers to the question of what to do if one testicle is larger than the other, you need to find out the anatomy of the structure of this organ, as well as normal rates.

For any man, the testicles are a very important organ on which reproductive function depends, as well as potency and libido. It is here that sperm are produced, which are the offspring of men.

In addition, the testes are a source of testosterone, which determines the level of potency and erection.

From the point of view of physiology, the different sizes of the testicles and their asymmetry are only a natural trick.

so you can avoid rubbing, twisting between each other, as well as trauma to the scrotum. Normally, the size of the testicles is about 4-6 cm in length, 2.5 cm in width.

But do not take these parameters as a template and standard of male attractiveness.

For reference! The size of the testicles determines the physical development of the man and his structure, that is, the larger the man himself, the larger his testicles.

What to do?

Reasonable will be to ask what to do if one testicle is larger than the other, as well as which specialist to contact.First you need to know how to conduct an independent inspection on this principle:

  • You need to examine your testicles in a calm state, if this was not preceded by sports or sex.
  • Visually compare organs with a mirror.
  • It is also important to evaluate the color of the testicles, in both testicles it should be the same.
  • Each testicle alternately rises to the groin, checking for pain.
  • In the same condition, you need to slightly squeeze the testicles to make sure there is no pain.
  • It is necessary to repeat the attempts that the man makes during urination, the pain in this case indicates the presence of problems.

You need to visit a doctor in case of such phenomena:

  • cardinal difference in testicular size (norm - 0.7 cm),
  • different shade of testicles
  • heterogeneous skin structure to the touch,
  • pain during examination
  • when one testicle has a high temperature compared to the second.

In this case, a urologist or andrologist, as well as a surgeon or traumatologist can give qualified advice, depending on the causes of this phenomenon.

An important condition for eliminating testicular imbalance is treatment as prescribed by your doctor. An important condition for recovery is a timely visit to a specialist. Self-medication or even refusal of therapy promises a man a number of consequences and complications. Only after identifying the causes of the imbalance of these organs, the doctor can find the optimal method of therapy.

For reference! Prevention measures in this case are a healthy diet and lifestyle, refusal of physical overloads, avoidance of hypothermia or overheating of the genitals, protection against viruses, infections, and injuries.

Often, an operation is needed to help a man, especially when it comes to cysts, tumors and neoplasms. In addition, surgery is used in the treatment of varicocele or to eliminate the effects of scrotal injuries. It will also be appropriate to take medications prescribed by your doctor.

Why can one testicle be larger than another?

The testicles are the most important organ for reproduction and procreation. This is a paired gland that produces sex cells and male hormones. The main function of germ cells (sperm) is the delivery of hereditary information to the egg. Penetrating into the egg, they stimulate its development.

Sperm cells cannot develop at temperatures above 35 ° C; therefore, nature provides for the location of the testicles outside the abdominal cavity.

The testicles also produce hormones that enter the bloodstream and stimulate the development of male symptoms: a mustache, beard, hairy vegetation on the body, the size of the genitals and the male figure structure.

Anatomical structure of the testis

The testicles (testicles or testes) are located in the perineum in the leather sacs - scrotum. They are located behind the base of the penis, the left is slightly lower than the right. The scrotum has two dissociated chambers for each testicle. The weight of each is within 20-50 g.

One is always a little more, the body does not have perfect symmetry. Their size and mass depends on the individual characteristics of the organism. Large, tall men are thought to have slightly larger testicles. Although there are exceptions.

Scientists still can not determine the cause of the size.

Outside, the testicle is surrounded by a whitish membrane called the albumen. Underneath is testicular substance, consisting of many cone-shaped lobules. The cone is directed towards the center. In each lobule passes 2-3 seed tubules, which in the central part merge into the duct. There can be up to 300 such lobules in each testis.

Already at 4 months of pregnancy, the baby will develop testicular appendages, which secrete hormones for the development of sexual characteristics of the unborn baby. Testicles descend into the scrotum from the inguinal region in 96% of newborn boys. If there is no omission before birth, but passes up to 6 weeks in a newborn, in rare cases up to a year.

If the boy after a year did not have a testicle descending into the scrotum, this is considered a disease - cryptorchidism. It can be single-sided or double-sided. As a rule, it happens in premature babies. There is no pill treatment, only surgery, and the sooner the better for the future man.

If the operation was not performed in childhood, then during the period of growing up, the pathology will be clearly visible externally. The scrotum on the one hand will be much smaller.

If the cause is a tumor

Sometimes you can confuse an enlarged testicle and an enlarged scrotum. If the scrotum is enlarged, then the eggs do not change size. A man can not always cope with this task on his own. Therefore, the help of a doctor is needed. The exact results will be clear after an ultrasound scan.

An enlarged egg rather than a scrotum may indicate a tumor in it. It can be either benign or malignant in nature.

With testicular cancer, the surface of the organ acquires a dense and tuberous structure. At first, the man does not feel pain. The disease is often diagnosed by chance. Therefore, it is recommended that if an increase in one of the testicles is detected, consult a doctor immediately. The pain appears as the tumor develops and the spermatic cord reaches it, as nerve endings pass through it.

In rare cases, a tumor forms immediately in two testicles. But there are times when oncology resumes several years after successful treatment.

Testicular cancer proceeds in the same way as other malignant neoplasms, with the growth of the tumor, it begins to metastasize to neighboring organs. Symptoms appear depending on the site of damage to the internal structures of the body.

Normal testicle sizes

A slight mismatch of the testicles to standard sizes is not a pathology, but a norm

If one egg is slightly larger than the other, men have no reason to worry. Of course, provided that such a disproportion has always been observed. As a rule, in most cases, it is the left testicle that is slightly larger than the right one. Moreover, this phenomenon has physiological reasons - if the testicles were the same, they would simply interfere with walking and fight against each other. It is precisely for the convenience of “wearing” one's own genitals that nature conceived so that one testicle is larger, and therefore heavier than the other.

The second reason why the right testicle is larger than the left or vice versa is because of the functioning of the organ. As a rule, all paired organs work differently. In women, during ovulation, the egg leaves only the follicle of one ovary, left or right, the second rests in this cycle. Men have a similar situation - the processes of maturation of sperm and steroid hormones in one testicle are more active than in the other. The second one is still involved in the process, but the load on it is about 30% less.

If necessary, the second testicle can intercept the baton, and begin to actively produce sex hormones and germ cells. This explains the opportunity to conceive a child even with only one testicle - it just starts to work “for two”, so the compensatory mechanisms that occur in the body are manifested.

The average sizes are as follows:

  • length - from 40 to 60 mm,
  • width - 25-35 mm
  • weight - 15-30 g.

Deviations between the sizes of the right and left testis within these limits are the norm. For example, if in men the length of one testicle is 4.5 cm and the other is 6 cm, there is no cause for concern.

Asymmetric arrangement is also the norm. As a rule, one testicle is always located a few centimeters below the second.

Pathological reasons for the increase in size

Changing the size of the testicles is an occasion for a comprehensive examination. If acute symptoms such as pain or fever occur, you should immediately visit a doctor.

Moreover, not only an increase, but also a sudden decrease in the size of the testicles testifies to the pathology. Consider the most likely causes of changes in the size of one organ.

Anabolic steroid

Another reason for the symmetrical decrease in testicles is the use of anabolic steroids by athletes. These are analogues of male sex hormones, which are administered intramuscularly to increase the level of free testosterone and the rapid growth of physical indicators.

Anabolic steroids have many side effects. One of them is testicular atrophy. This is because with regular injections of testosterone, the testes do not work, since they do not need to produce their own hormone. Long “rest” entails dysfunction and atrophy. It should be noted that this change is often irreversible.

Reduction of the testicles causes not only “sports” testosterone, but also hormonal drugs prescribed by a doctor for the treatment of various diseases associated with impaired hormone production. True, when using the prescribed drugs, the risk of atrophy is minimal, because due to a lack of testosterone, the body perceives the medication well, provided that they are selected by the specialist in the right dosages.

A decrease in the testicles can also provoke female sex hormones. They are used to treat hormone-dependent tumors in men. This procedure is called medical castration and, as expected, interrupts the testes.


Severe weakness and dizziness after a traumatic stroke may indicate internal bleeding

If the left egg is 2 times larger than the right, traumatic damage to the testes should be excluded. In severe injuries, internal bleeding may open. Blood accumulates in the testicle, forming edema. At the same time, changes in the color of the skin of the scrotum are pronounced - it becomes blue, burgundy or dark purple. Depending on the severity of the hemorrhage, a discoloration of the skin can spread throughout the pubis.

The following symptoms appear due to internal bleeding:

  • dizziness and weakness
  • general malaise
  • headache,
  • convulsive seizures
  • fainting.

Blood stagnates in the scrotum and cannot find a way out, therefore it is distributed to closely located tissues and organs. In severe cases, discoloration of the skin and penis is observed.

If such symptoms appear after an injury, you should immediately consult a specialist. The man will receive medical care, and the sooner the stagnation of blood is eliminated, the less harm the injury causes to the reproductive system.


If a man’s right testicle is larger than the left, the scrotum swells and severe pain is felt, the probable cause is epididymitis. This pathology is manifested by inflammation of the epididymis. The reasons for the development of this disease:

  • appendage injuries, e.g. squeezing,
  • infectious prostatitis
  • bacteria, viruses and fungi,
  • advanced infectious urethritis,
  • complications after surgery or catheterization of the urethra.

The disease most often occurs in acute form. It begins with a pulling pain in the testicle, then the body temperature rises, severe scrotal edema appears. In this case, the inflamed testis can increase several times, compared with the normal size.

Inflammation is treated with antibiotics, drugs to improve trophic processes. After removal of the acute inflammatory process, a course of restorative physiotherapy is prescribed.

Torsion of the spermatic cord

The scrotum gets hot

The right egg is bigger than the left one and it hurts - it can be a testicular torsion. There are a lot of reasons for the development of this phenomenon, most often this is due to the strong mobility of the testicle, because of which it is twisted around its axis.

Pathology is very dangerous and can lead to testicular necrosis. Possible complications are gangrene of the testis, abscess of the scrotum and inflammation of the spermatic cord.

  • sharp painful pain
  • increase in the size of the testis,
  • a sense of pulsation in the scrotum
  • fever of the skin of the scrotum.

Due to the torsion of the spermatic cord, blood cannot circulate normally in the testis. It stagnates, the body does not receive nutrition, which leads to necrotic lesion of the testicles.

Treatment depends on the degree of torsion and how soon the man went to the doctor. Sometimes it is possible to return the testis to the correct position with the help of a bloodless turn of the testis around the cord, conducted by a doctor. However, in most cases, a man is shown an urgent operation to fix the testicles, otherwise you may lose your organ.

Malignant tumors (cancer)

The greatest danger to the life of a man whose suddenly right egg is bigger than the left and hurts is cancer. Malignant disease is manifested by pain only in the later stages, when a testicular tumor begins to metastasize to surrounding tissues. In this case, pain is felt only on palpation. Also, malignant tumors are accompanied by minor edema. Thus, the increase in the size of one testicle is not so pronounced that it was possible to recognize the pathology in time.

What to do if one egg is larger than the other - consult a doctor. It is important to accurately diagnose, you can’t do it yourself. It should be remembered that testicular cancer is successfully treated before the spread of metastases, and in the later stages can lead to death.

When to see a doctor?

If sex brings only pain and not pleasure, then it's time to see a doctor

Having figured out why one egg can be larger than another and finding out the causes that cause this phenomenon in men, one should not delay the visit to the doctor. Alarming symptoms to watch out for:

  • sudden increase or decrease in one testicle,
  • discomfort during intercourse, ejaculation,
  • unpleasant sensations in the testicles when playing sports,
  • aching paroxysmal pain
  • palpation discomfort,
  • edema.

The doctor will quickly diagnose and prescribe adequate therapy. Surgical intervention is indicated for the treatment of varicocele and torsion. Cancer requires long-term therapy, the operation is successful in the initial stages. Epididymitis and other inflammatory diseases are successfully treated with medication.

Having figured out which egg is larger for men, right or left, one should be able to distinguish pathology from ages, so if one egg is larger than another in a teenager, this is not a cause for concern if there are no other symptoms.

One testicle more than another in men - causes

Before answering the question: “why is one testicle more than another in men?”, One should understand the fact that some deviations from the norm are permissible, and if visually disproportionate testicles do not cause a man any inconvenience, there is no reason for concern.

There are some reasons why one egg can significantly exceed the size of another, namely:

  • Physical damage (injury). The testicles are susceptible to shock and shock. It can increase immediately after a stroke or gradually increase over several days.
  • Epidymitis (inflammation of the epidermis). Leads to infertility of both testicles.
  • Orchitis. It develops with running epidemiitis, the symptoms are more pronounced (purulent
    education, inflammation).
  • Tumor. Among the tumors, benign and malignant are distinguished. At
    palpations and self-examination, it is difficult to distinguish one from the other, you should immediately contact a specialist.
  • Testicular inflammation. With inflammation, surgery is required.
  • Varicocele. With this disease, one of the testicles is lower and larger in a standing position. There is a varicocele in both testicles, but it is much less common than just one varicocele.
  • Torsion of the spermatic cord. Externally, the color of the scrotum is not similar to the color of the body, the scrotum becomes pale or spotty.If assistance was not provided in the first twelve hours, the egg may remain unviable.

Treatment of abnormalities

As soon as the man visits the clinic, after the diagnosis and determination of the causes of testicular imbalance, the doctor will prescribe the appropriate treatment. It is only important to see a doctor in a timely manner so as not to encounter severe complications that are not amenable to correction. In parallel with this, a man needs to adjust his diet, lead an active lifestyle, and abandon excessive physical exertion.

Treatment will depend entirely on the established causes of the imbalance. This can be anti-inflammatory, hormonal, antibacterial therapy, or it can be surgical intervention if neoplasms were found. It is important for a man to protect his genitals from overheating and hypothermia, from infections and sexually transmitted diseases.

Reason 1. Drug Use

The first reason why one testicle is larger than the other in men may be taking various drugs. And especially marijuana. Scientists have proven that this plant is able to resize this male organ. Sometimes it happens that one testicle decreases, while the other remains in its normal form. It turns out a disturbing guy imbalance.

When to seek doctoral help

A man should know that you need to carefully monitor the health of the entire genitourinary system. You should seek medical help in the following cases:

  • If the size of the testicles is radically different. The normal difference is 0.7 cm. All that is more is already a deviation from the norm.
  • If the color of the testicles is not the same.
  • If their skin or structure is uneven to the touch.
  • If you feel soreness when touched.
  • If one testicle is hotter than the other.


To prevent any problems with this male organ, prevention is very important:

  • Be sure to lead a healthy, full-fledged lifestyle.
  • All received physical activity should not lead to overvoltage.
  • Do not overheat or supercool the testes.
  • This body should be tried to protect from any injuries and infections.

Well, of course, you need to periodically conduct an independent examination of the testicles at home and from time to time go for a physical examination in the clinic.

The left testicle is larger than the right

In most men, it is the left egg that is larger than the right. This is due to the conditions in which it is located, as well as the fact that right-handed people are quantitatively dominant over left-handed people, while right-handed people usually have a left egg larger than a right one. For example, a right-hander almost always takes a step with his right foot a little further than his left. In cases where one egg is 1 - 1.5 centimeters larger than the other, do not worry, since such a deviation is considered within the normal range.

The right egg is larger than the left

This phenomenon is much less common, because, as mentioned earlier, there are more right-handed men. An increase in the right egg is common among left-handed men because it is more convenient for them to sit with their left legs thrown to the right, thereby the right egg often experiences pressure, and eventually deforms. As with the left testicular, there is no reason to worry until symptoms such as redness, a significant increase in a short time, or a sharp pain appear. In both cases, you should visit a urologist. Many diseases of the testiculars cannot be detected by palpation, so the urologist often prescribes an ultrasound.

Why do men have one testicle lower than the other?

It has absolutely no fundamental significance if the right egg is lower than the left or vice versa the left is lower than the right. Of the previously mentioned causes, a symptom such as drooping of the testicular can cause a varicocele, hydrocele, twist or inflammation. Such inflammations, for example, include such as orchitis or epidemiitis:

  • Varicocele is a significant expansion of the veins of the predominantly left testicle. Three degrees of this disease are distinguished. At the first degree, detection is possible using ultrasound. The second and third degrees are identical, the only difference is that with the second degree, dilated veins can be felt while standing, and with the third degree of varicose veins, they can be felt both standing and lying down. The disease often causes sexual dysfunction and in almost half of cases reversible infertility.
  • The right or left testicular strongly falls when twisting the spermatic cord. Due to poor blood supply, the organ slowly dies until an operation is performed to unwind the cord.
  • Orchitis often occurs among young men with hypothermia, sometimes it acts as a complication of the flu (rarely). In the acute degree of the disease, the temperature rises sharply, pain appears, dizziness. If you ignore the disease, the organ atrophies.
  • Hydrocele or dropsy, occurs mainly in newborns. It is characterized by the appearance of a transparent liquid, which includes various proteins. Fluid builds up under the egg shells, causing inconvenience to the wearer and contributing to the omission of the testicular.

What to do if the testicle is one bigger than the other?

If the right or left egg is larger than the other, you need to examine it yourself, probing with clean hands in a standing and lying position. If you feel discomfort when touching, you should contact a urologist. Based on the examination, the urologist can offer the patient an ultrasound of the abdominal cavity, an ultrasound of the egg, or in the worst case, an emergency operation.

In no case should you use the methods of traditional medicine or postpone the visit of specialists until later. Traditional medicine can harm, leaving a man infertile. Ignoring such diseases leads to serious consequences, for example, to advanced cancer tumors.


A slight difference in the size of the testicles of about 0.7 cm is an absolutely normal phenomenon, since all paired organs in a person assume a slight asymmetry. If the size of the testicles is much more different from each other, it is worth visiting a doctor. The fact is that one testicle can be larger than the other due to a number of serious diseases and pathologies requiring medical intervention.

Watch the video: Scrotum Swelling Painless (February 2020).

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