Varicocele is a swelling of the veins in the scrotum, and it often develops during puberty or young adulthood. Many people with varicocele have no symptoms, but some notice a dull ache, a heavy feeling, or a scrotum that looks or feels different, especially after standing for a long time. Not everyone will have the same experience. Varicocele often lasts unless it is treated, and doctors may watch it over time or treat it with surgery or a minimally invasive procedure if it causes pain, testicular shrinkage, or fertility problems. Varicocele is not usually life-threatening, but early symptoms of varicocele are worth discussing with a doctor if they keep coming back.
How many people live with Varicocele?
Varicocele is estimated to affect roughly 600-800 million males worldwide (StatPearls, 2024; United Nations, 2024) and about 25-33 million in the United States (StatPearls, 2024; U.S. Census Bureau, 2024). That range comes from the widely used estimate that about 15% to 20% of males have a varicocele, and it can vary depending on age and whether it is found during an exam or on an ultrasound scan.
Overview
VaricoceleSymptoms
Varicocele often causes no symptoms. When it does, people with varicocele may notice a dull aching scrotal pain, a heavy feeling, or enlarged, twisted veins, especially after standing or exercise. Some also have trouble with fertility.
Outlook and prognosis
Varicocele is often manageable, and many people live with few or no long-term problems. When it causes pain, testicular shrinkage, or fertility issues, monitoring or treatment can often improve comfort and support fertility.
Causes and risk factors
Varicocele often develops when valves in the scrotal veins do not work well, so blood pools. Risk is higher during puberty and young adulthood, especially because of normal left-sided vein anatomy. Heavy straining can sometimes make it more noticeable.
Genetic influences
Genetics may play a modest role in varicocele, mainly by affecting vein wall strength and valve function. Family patterns are sometimes seen, but most varicocele cases are not tied to a single gene or clear inherited change.
Diagnosis
Varicocele is usually diagnosed during a physical exam, often while standing and bearing down. If needed, a scrotal ultrasound confirms the diagnosis of varicocele and checks blood flow and testicle size.
Treatment and drugs
Varicocele treatment depends on symptoms, fertility plans, and test results. Many with varicocele only need monitoring, scrotal support, and pain relief such as ibuprofen. If pain continues or fertility is affected, a procedure can close the enlarged veins.
Symptoms
Many people with varicocele feel nothing at all, and it may only come up during a routine exam or fertility visit. You might notice small changes at first, such as a dull ache, a heavy feeling in the scrotum, or veins that seem more obvious after standing. Symptoms of varicocele often affect one side, usually the left, and may get worse later in the day, after exercise, or when you have been on your feet for a long time. When people search for the early symptoms of varicocele, they are often describing mild discomfort or a visible change in the scrotum rather than severe pain.
Many people with varicocele do not feel any symptoms. The condition may first be noticed during a routine physical exam or during a fertility evaluation.
Varicocele can cause a mild, aching pain in the scrotum or groin rather than a sharp pain. It often becomes more noticeable after exercise or after standing for a long time.
Some people describe a sense of heaviness, dragging, or fullness on one side of the scrotum. This can make long walks, workouts, or even the end of the day feel more uncomfortable.
Symptoms often get worse as the day goes on, especially in warm weather or after being on your feet. Many people feel some relief when lying down because pressure in the veins drops.
How people usually first notice Varicocele?
People usually first notice a varicocele as a dull, aching feeling or a sense of heaviness in the scrotum, especially after standing for a long time, exercising, or later in the day. Some people with varicocele do not feel pain at all and first become aware of it when they notice enlarged, twisted veins that can feel a bit like a soft bundle above the testicle, or when a clinician finds it during a routine exam. In some cases, how varicocele is first noticed is through fertility testing or when one testicle, often the left, seems smaller than expected.
Types of Varicocele
Varicocele can affect daily life in different ways, from no symptoms at all to a dull, dragging ache after standing or exercise. Doctors usually describe the main types of varicocele by how easily they can be found on exam or ultrasound, and those differences often track with how noticeable symptoms are. Symptoms don’t always look the same for everyone. When people ask about the types of varicocele, they are often talking about subclinical varicocele and grades 1 through 3.
Subclinical
This type is too small to feel during a physical exam and is usually found only on an ultrasound. Many people have no symptoms, though some may be evaluated because of fertility concerns rather than pain.
Grade 1
This varicocele is small and can usually be felt only when bearing down, such as during coughing or straining. Symptoms are often mild or absent, but some people notice a light ache or heaviness later in the day.
Grade 2
This type is easier to feel during a routine exam without straining, but it may not be visible through the skin. Discomfort, scrotal heaviness, or a sense of pressure can be more noticeable, especially after long periods of standing or exercise.
Grade 3
This is the largest and most obvious type, and it can often be both seen and felt. Pain or heaviness may be more frequent, and some people notice visible enlarged veins or a difference in testicle size on the affected side.
Can I slow down the onset of symptoms?
Probably not in a meaningful, proven way: there is no strong evidence that lifestyle changes or medicine can reliably delay the start of a varicocele, which is a group of enlarged veins in the scrotum. Healthy habits like staying at a healthy weight and avoiding frequent heavy straining may help with comfort or pressure, but they have not been shown to prevent a varicocele from developing, and reducing symptoms is not the same as preventing the condition. There is no established preventive treatment, but if pain, one testicle seems smaller, or fertility problems come up, early medical care can help you decide whether watchful follow-up or treatment makes sense.
What genetics can tell you about symptoms
For varicocele, genetics may help explain why it seems to run in some families, likely because inherited differences can affect vein walls or the valves that help blood flow in the scrotum. But at this point, genetics cannot reliably tell which symptoms someone will have, how much discomfort or testicular shrinking may occur, or exactly when problems such as pain or fertility changes might begin. Many living with varicocele have few or no symptoms, while others develop a heavy, achy feeling or fertility concerns, and that variation is usually not something genetic testing can predict well.
Causes and risk factors
Blood can pool in the veins above the testicle when their tiny valves do not work well, and this is the main cause of varicocele. Varicocele often starts during puberty, and it is more common on the left side because of the way that vein drains in the body. Family history can be one part of the story, and some people may inherit vein wall or valve traits that raise risk. Among the risk factors for varicocele, long periods of standing or repeated heavy straining may increase pressure in these veins and make the problem more noticeable. If a varicocele appears suddenly, especially on the right side or later in life, doctors may check for another condition that is blocking blood flow.
What are the most common causes or risk factors?
Most varicoceles happen when the small one-way valves in the veins above the testicle do not work well, so blood backs up and the veins widen. They often first show up during puberty, are much more common on the left side because of the way that vein drains, and they can run in families, which suggests an inherited tendency in some people. They are usually not caused by anything you did, although long periods of standing or straining can make them easier to notice.
Environmental and biological risk factors
Varicocele is usually linked to how the veins around the testicle are arranged and how easily blood can flow back toward the abdomen. When people ask about risk factors for varicocele, most of the well-known ones are biological rather than environmental. Some risks are carried inside the body, others come from the world around us. For primary varicocele, outside exposures have not been shown to play a major role.
Varicocele often first appears during puberty, when the testicles and nearby blood flow increase quickly. It is much less common before puberty.
Most varicoceles happen on the left because that testicular vein is longer and drains at a less direct angle. This can make it easier for pressure to build up and blood to pool.
Tiny valves inside the veins normally help blood move in one direction. If they do not close well, blood can flow backward and slowly stretch the vein.
Pressure on a draining vein from nearby structures in the abdomen can raise the chance of varicocele. A well-known example is compression of the left renal vein, sometimes called nutcracker syndrome.
Genetic risk factors
Varicocele often shows up in the teen years or when fertility concerns lead to an exam, and family patterns suggest genes can play a part. The genetic risk factors for varicocele are still being studied, and no single gene has been shown to cause most cases on its own. Instead, inherited differences that affect vein strength, vein valves, or tissue support may raise the chance of developing one. It is usually a combination of influences rather than one clear cause.
Family history: Varicocele can cluster in families, which suggests an inherited tendency in some people. If a close relative has had a varicocele, your own chance may be higher, although many with a family history never develop one.
Vein wall traits: Some inherited traits may affect how strong or stretchy vein walls are. When these veins widen more easily, blood can pool and make varicocele more likely.
Valve differences: Tiny one-way valves in veins help blood move back toward the heart. Inherited differences in how these valves form or work may allow blood to flow backward and contribute to varicocele.
Connective tissue disorders: Rare inherited conditions that affect connective tissue can also affect the support around veins. In some people, this may increase the chance of a varicocele, but it explains only a small share of cases.
Multiple gene effects: Most people with varicocele do not have one single harmful gene change causing it. Many cases likely reflect several small inherited factors acting together rather than one clearly inherited disorder.
Lifestyle risk factors
Varicocele symptoms can be influenced by habits that raise pressure in the abdominal and pelvic veins or make venous pooling worse over time. For many people, lifestyle risk factors for varicocele are less about causing it from scratch and more about increasing discomfort, swelling, or progression. The effects vary, but daily routines can matter, especially when symptoms are already present.
Repeated heavy lifting or straining can increase pressure inside the abdomen and spermatic veins. Over time, this may worsen venous enlargement and make scrotal aching more noticeable.
Standing for long periods can promote blood pooling in the veins of the scrotum. This may increase heaviness, swelling, or discomfort later in the day.
Sitting for extended periods may reduce venous return and contribute to pelvic congestion. In some people, this can make varicocele-related discomfort more persistent.
Chronic constipation and frequent straining during bowel movements can repeatedly raise abdominal pressure. That extra pressure may aggravate a varicocele and make symptoms flare more often.
Risk prevention
For many people, varicocele cannot be fully prevented because it often relates to how the veins around the testicle develop and how well their valves work. Prevention is about lowering risk, not eliminating it completely. In day-to-day life, that usually means reducing pressure in the belly and groin, avoiding things that worsen discomfort, and getting checked if you notice scrotal swelling, aching, or possible early symptoms of varicocele.
Carrying excess body weight can raise pressure inside the abdomen, which may put more strain on veins in the scrotum. Reaching and maintaining a healthy weight may help lower the chance that a varicocele becomes more noticeable or bothersome.
Heavy straining from constipation or repeated breath-holding during lifting can increase pressure on these veins. Drinking enough water, eating fiber, and using proper lifting technique may help reduce that pressure.
A long-lasting cough can repeatedly raise abdominal pressure over time. Treating asthma, allergies, reflux, or other causes of chronic coughing may help reduce strain that can worsen varicocele symptoms.
Regular activity supports circulation and weight control, but very heavy lifting may aggravate discomfort in some people with varicocele. If aching starts during workouts, lighter loads and steady breathing may help prevent varicocele from getting worse.
Can you prevent Varicocele?
You usually cannot prevent a varicocele, which is a swelling of veins around a testicle. It most often happens because of the way those veins and their small valves are built and how blood flows through them, not because of something you did wrong. There is no proven lifestyle change that reliably stops a varicocele from forming, but seeing a doctor if you notice scrotal heaviness, aching, or swelling can help you get care early.
Transmission
Varicocele is not an infection, so it cannot be passed from one person to another through sex, kissing, blood, or everyday contact. If you have Varicocele, you did not catch it from someone else, and you cannot give it to a partner.
Instead, Varicocele develops when veins in the scrotum become enlarged because blood does not drain as well as it should, often starting around puberty. There is no infectiousness with Varicocele, and although some people may wonder about the genetic transmission of Varicocele, it is not known to follow a clear, simple inherited pattern.
When to test your genes
For varicocele itself, genetic testing is not routinely recommended. It may be worth discussing only if you also have infertility, especially very low sperm counts or no sperm in the semen, because testing can sometimes uncover inherited causes that affect treatment choices and family planning.
Diagnosis
Many people with varicocele first notice a dull, heavy feeling in the scrotum, discomfort after standing, or trouble during a fertility evaluation. Doctors usually diagnose varicocele with a physical exam and, when needed, an ultrasound to confirm what they feel. The diagnosis of varicocele is often straightforward, but the exact approach can vary depending on symptoms, age, and whether fertility is a concern.
Your doctor asks about scrotal pain, heaviness, swelling, and whether symptoms get worse later in the day or after exercise. A history of fertility problems or a difference in testicle size can also help guide the exam.
The scrotum is examined while you are standing and sometimes lying down, because a varicocele is often easier to feel when upright. You may be asked to bear down briefly, which can make enlarged veins more noticeable.
An ultrasound uses sound waves to show enlarged veins around the testicle and how blood is flowing through them. This is often used when the exam is unclear, when symptoms do not fully match the findings, or when doctors want to confirm how varicocele is diagnosed.
If pregnancy has been difficult, a semen test may be recommended to check sperm count, movement, and shape. This helps show whether the varicocele may be affecting fertility.
How is Varicocele diagnosed?
A varicocele is usually diagnosed during a physical exam, when a doctor feels the veins above the testicle, often while you are standing and sometimes while you bear down or cough so the swelling is easier to notice. If the exam is not clear, or if there are concerns about pain, testicle size, or fertility, an ultrasound may be used to show enlarged veins and how blood is flowing. Genetic testing is not used to diagnose a varicocele.
Stages of Varicocele
Varicocele does not have defined progression stages. This is because it is usually described by how enlarged the veins are at the time of examination, rather than by a predictable step-by-step worsening over time. Doctors usually start with a conversation about symptoms such as a heavy feeling in the scrotum, aching after standing, or fertility concerns, and then examine the scrotum while you are standing and sometimes while bearing down. If needed, an ultrasound can confirm how varicocele is diagnosed, help assign a grade such as small, moderate, or large, and monitor changes over time.
Outlook and prognosis
The outlook for people with varicocele is generally very good, and many never develop serious health problems or need treatment. When symptoms such as pain, testicular shrinkage, or infertility occur, treatment often improves discomfort and can improve semen parameters, although fertility outcomes vary from person to person. In adolescents, close follow-up is important because some may develop slower testicular growth on the affected side, but timely intervention usually helps preserve function. Varicocele is not considered a life-threatening condition and does not increase overall mortality. Long-term concerns mainly relate to reduced fertility or persistent discomfort rather than progressive illness, so the prognosis for varicocele in adults is usually favorable with appropriate monitoring and care.
Long-term effects
Many people with varicocele live for years with few day-to-day problems, while others notice a dull ache after standing, exercise, or a long day on their feet. The long-term picture is often shaped by whether the enlarged veins affect the testicle over time. Long-term effects vary widely, from no lasting issues at all to changes in fertility, testicular size, or hormone function.
Varicocele can affect sperm quality in some people, which may make it harder to conceive. This is one reason people ask whether early symptoms of varicocele can point to later fertility problems, although many with varicocele still father children.
In some adolescents and adults, the affected testicle may grow more slowly or become smaller over time. This can happen when blood flow and heat balance around the testicle are disrupted for a long period.
Some people with varicocele have long-term aching, heaviness, or a dragging feeling in the scrotum, especially later in the day. The discomfort is often mild, but for some it can become frequent enough to affect exercise, work, or sex.
In some cases, varicocele is linked with lower testosterone production over time. For many, symptoms are subtle and may include lower energy, reduced sex drive, or less sense of physical stamina.
How is it to live with Varicocele?
Living with a varicocele can range from not noticing much at all to dealing with a dull, dragging ache or a sense of heaviness in the scrotum, especially after standing for a long time, exercising, or at the end of the day. For many people, daily life is mostly normal, but some may find that physical activity, tight clothing, or long hours on their feet become uncomfortable, and worries about fertility can weigh just as heavily as the physical symptoms. Partners may be affected too, especially if the varicocele becomes part of a fertility workup, because the stress, uncertainty, and medical appointments can touch both people, not just the one with the diagnosis.
Treatment and drugs
Varicocele treatment depends on how much it affects daily life, and many people with varicocele do not need treatment if they have no pain, testicle changes, or fertility concerns. When treatment is needed, doctors often start by managing symptoms with supportive underwear and over-the-counter pain relievers such as ibuprofen or acetaminophen, especially if discomfort shows up after standing for long periods or exercise. Doctors sometimes recommend a combination of lifestyle changes and drugs. If varicocele is linked to ongoing pain, slower testicle growth in a child or teen, or trouble with fertility, a procedure to close off the enlarged veins may be recommended; this is most often done with surgery or a less invasive catheter-based treatment called embolization. Not every treatment works the same way for every person, so follow-up helps check pain, testicle health, and whether treatment is helping with fertility goals.
Can you cure Varicocele?
Yes, a varicocele can often be fixed, usually with surgery or a small procedure that closes off the enlarged veins so blood can flow another way. If it is not causing pain, testicle changes, or fertility problems, many people do not need treatment, but treatment can often relieve symptoms and may help protect fertility.
Non-drug treatment
For many living with varicocele, treatment outside of medicine often focuses on easing discomfort and reducing day-to-day strain. Many find that a few practical steps help, especially if standing for long periods, exercise, or the early symptoms of varicocele make the scrotum feel heavy or achy. Non-drug treatments may be recommended when symptoms are mild, when fertility is not an immediate concern, or while deciding whether a procedure is needed. Not every approach works the same way, and care is often tailored to pain, activity level, and plans for having children.
Supportive underwear or an athletic supporter can help reduce the dragging, heavy feeling that some people with varicocele notice during the day. This may be especially helpful with walking, exercise, or long hours on your feet.
Cutting back on heavy lifting or straining can ease pressure in the veins around the testicle. Some may find it helps to take breaks, avoid prolonged standing, and build back activity more gradually.
A cool pack wrapped in cloth can soothe aching or swelling after activity. It should be used for short periods, usually about 15 to 20 minutes at a time, to protect the skin.
Some non-drug options are delivered by specialists, including pelvic floor physical therapy when groin or scrotal pain has more than one cause. This can help if muscle tension in the lower pelvis is adding to discomfort.
Your genes may have an impact on how drugs work for you
For most people with a varicocele, treatment is usually a procedure rather than long-term medicine, so genes often do not play a major part in care. Still, if someone uses pain relievers or medicines as part of fertility treatment, inherited differences can affect how quickly the body breaks a drug down, which may change how well it works or how likely side effects are. This kind of gene-based drug response, sometimes called pharmacogenomics, is not a routine part of varicocele treatment today, but it can matter in some situations when choosing or adjusting medicine.
Pharmacological treatments
A varicocele can cause a heavy, aching feeling in the scrotum, especially after standing for a long time or exercising, and medicine is mainly used to ease that discomfort rather than to make the enlarged veins go away. Medication can feel like a big step, but for varicocele, drug treatment is usually simple pain relief if symptoms are mild. If pain is ongoing, the varicocele is affecting fertility, or the scrotum looks different over time, clinicians often look beyond medicines because no drug has been shown to cure a varicocele itself.
Ibuprofen and naproxen are common anti-inflammatory pain relievers that may help with mild varicocele ache or swelling-related discomfort. They are often used as needed, but may not be safe for everyone, especially people with kidney disease, stomach ulcers, bleeding risk, or certain heart conditions.
Acetaminophen can help with varicocele pain when anti-inflammatory drugs are not a good fit or upset the stomach. It does not reduce inflammation, but many people use it for short-term comfort while monitoring early symptoms of varicocele or waiting for a medical review.
There is currently no medicine that reliably shrinks a varicocele or fixes the underlying vein problem. If one medicine doesn’t help, that doesn’t mean treatment has failed, because persistent pain or fertility concerns may point to non-drug options being more effective.
Genetic influences
If several men in your family have had enlarged scrotal veins, it’s natural to ask whether family history plays a role. For varicocele, genetics may matter in some families, but they are not thought to be the whole story. Research suggests varicocele can run in families, likely because inherited traits may affect the strength of the vein walls or how well the tiny valves inside those veins work. There is no single known varicocele gene, and most people with varicocele do not have a clear inherited disorder behind it. Even so, a family pattern can give doctors a useful clue about who may be more likely to develop varicocele, especially when it shows up at a younger age or alongside fertility problems.
Is Varicocele genetic?
Genetics may play a modest role in varicocele, mainly by affecting vein wall strength and valve function. Family patterns are sometimes seen, but most varicocele cases are not tied to a single gene or clear inherited change.
Having a genetic risk is not necessarily a diagnosis
Changes in genes are a normal part of human biology and are widely seen in the general population. Most of these variants do not have a direct effect on health and simply reflect natural human diversity. For many genes, carrying a variant connected with a condition suggests a possible link rather than a certain diagnosis, especially when several genes and environmental factors are involved. In some situations, though, a single well-understood variant in a particular gene can be enough to confirm a diagnosis.
Pharmacogenetics—how genetics influence drug effects
If a varicocele is causing aching, heaviness, or fertility problems, treatment is usually chosen based on symptoms, test results, and whether you hope to have children. Not every difference in response is genetic, but for varicocele there is no routine genetic test that tells doctors which treatment or pain medicine will work best. Most people with varicocele do not need medication tailored to their genes, because care often involves monitoring, supportive underwear, simple pain relief, or a procedure to close off the enlarged veins. Genetics can still matter in a broader way: some inherited differences affect how quickly your body handles certain pain medicines or anesthesia, which may be relevant around a procedure. Even so, these drug-gene effects are not specific to varicocele and do not usually change first-line treatment options for varicocele. For many living with varicocele, the biggest treatment decisions are still about pain, fertility goals, and whether a procedure is likely to help.
Interactions with other conditions
Many living with varicocele notice that the main day-to-day issue is not the vein itself, but how it can affect fertility, testicle growth, or ongoing aching in the scrotum. Doctors call it a “comorbidity” when two conditions occur together, and with varicocele this most often comes up when someone is also being checked for male infertility or low testosterone. Some may find that symptoms are hard to sort out because a heavy, dragging discomfort can overlap with problems such as an inguinal hernia, fluid around the testicle, or inflammation, so a proper exam matters. A sudden new varicocele, especially on the right side or one that does not get smaller when lying down, can sometimes point to a blockage of blood flow from a kidney or the abdomen and needs prompt medical attention. In teenagers, varicocele may also be watched more closely if one testicle is growing more slowly than the other, since that can affect future reproductive health. If you are looking into early symptoms of varicocele, it helps to tell your doctor about any fertility concerns, change in testicle size, or new one-sided swelling, because those details can guide whether another condition needs to be ruled out.
How genes can cause diseases
Humans have more than 20,000 genes, each carrying out one or a few specific functions in the body. One gene instructs the body to digest lactose from milk, another tells the body how to build strong bones and another prevents the body's cells from beginning to multiply uncontrollably and developing into cancer. As all of these genes combined are the building instructions for our body, a defect in one of these genes can have severe health consequences.
Through decades of genetic research, we know the genetic code of any healthy/functional human gene. We have also identified that in certain positions on a gene, some individuals may have a different genetic letter from the one you have. We call these hotspots "Genetic Variations" or "Variants" in short. In many cases, studies have been able to show that having the genetic letter "G" in the position makes you healthy, but having the letter "A" in the same position disrupts the gene function and causes a disease. Genopedia allows you to view these variants in genes and summarizes all that we know from scientific research, which genetic letters (Genotype) have good or bad consequences on your health or on your traits.
What other conditions can cause similar symptoms to Varicocele?
An achy, heavy, or swollen scrotum can also happen with a hydrocele, which is a pocket of fluid around a testicle, a groin hernia that bulges down into the scrotum, or an infection or irritation in the testicle or the tube behind it. Less often, a lump or swelling from a growth in the testicle can seem similar, which is why any new scrotal change should be checked by a clinician.
History
For many people, a varicocele comes to attention in a very ordinary way: a dull ache after standing all day, a feeling of heaviness in the scrotum, or questions that come up during a fertility check. Long before modern scans were available, doctors noticed that some men had enlarged, twisted veins above the testicle that could become more obvious with standing or straining. These early observations helped separate varicocele from other causes of swelling, such as hernias or fluid around the testicle.
Across cultures and time periods, swollen veins in different parts of the body were recognized as a medical problem, and varicocele gradually came to be understood as the same kind of issue happening in the veins that drain the testicle. Older medical descriptions relied mainly on what could be felt during an exam, so mild cases were easy to miss. As medical science evolved, doctors became better at grading how large a varicocele was and at linking it with symptoms like discomfort, shrinking of the affected testicle, and trouble with fertility in some people.
A major shift came when ultrasound became widely used. This let clinicians see blood flow and vein size without surgery, making it easier to confirm a varicocele and to detect smaller ones that might not be obvious on physical exam. In recent decades, awareness has grown around the connection between varicocele and male infertility, especially when people are being checked for low sperm count or abnormal sperm movement.
Treatment has also changed over time. Earlier care focused on open surgery, while newer approaches have included microsurgery and image-guided procedures that block the affected veins from the inside. These changes have made treatment more precise and often easier to recover from, although not everyone with a varicocele needs treatment. Knowing this history helps explain why early symptoms of varicocele can still be subtle today, and why diagnosis often depends on both symptoms and a careful exam rather than symptoms alone.