What testicular cancer feels and looks like
The most common sign of testicular cancer is a lump or swelling in one testicle, usually painless. You might notice it while bathing or during a self-exam—it feels different from the rest of the testicle tissue, often harder or denser. Some men describe it as a pea-sized bump; others notice the whole testicle has grown larger or feels heavier than usual.
Not all lumps are cancer, and not all testicular cancer causes a lump. Some men first notice pain or a dull ache in the testicle or lower abdomen. Others feel a sudden collection of fluid around the testicle, which can make the scrotum feel swollen or tender. A few experience breast tenderness or enlargement—a side effect of hormones the cancer cells produce—before noticing anything in the testicles themselves.
The key is noticing change. If a testicle feels different than it did a month ago, or if you feel something you have never felt before, that is worth investigating with a doctor. Many conditions cause testicular swelling or pain that are not cancer, but only a medical exam can tell the difference.
Key Takeaways
- A painless lump, swelling, or hardness in one testicle is the most common sign, though not all testicular cancer causes a lump.
- Pain, heaviness, or a dull ache in the testicle or lower abdomen can also be an early warning, sometimes before any visible swelling.
- Breast tenderness or swelling in one or both breasts may occur because some testicular cancers produce hormones that trigger this response.
- Any change in how a testicle looks or feels—size, texture, weight, or pain—warrants a conversation with a doctor, even if you are not certain something is wrong.
- A doctor uses ultrasound to look inside the testicle and determine whether a lump or swelling is cancer or a benign condition.
How to examine your testicles
A testicular self-exam takes about three minutes and helps you notice changes early. The best time is after a warm shower or bath, when the skin of the scrotum is relaxed and loose. Stand in front of a mirror and look for any visible swelling, redness, or difference in size between the two sides.
Then gently roll each testicle between your thumb and fingers, using both hands. Feel the entire surface—top, bottom, and sides. A normal testicle is smooth, egg-shaped, and about the size of a walnut or small grape, depending on your body. You will feel a cord-like structure at the back called the epididymis; that is normal and should not be confused with a lump. A lump or hard spot on the testicle itself, or a sudden change in size or texture, is what to watch for.
Do this exam once a month so you become familiar with how your testicles normally feel. Familiarity makes it easier to spot something new. If you notice a lump, swelling, pain, or any change, schedule a doctor's visit. Most testicular lumps are not cancer—many are cysts, fluid collections, or scar tissue—but a doctor needs to check.
When to see a doctor
See a doctor if you notice a lump, swelling, hardness, or pain in either testicle that lasts more than a few days. You do not need to wait for it to grow or hurt more; early evaluation is better. If you have had an injury to the testicle and swelling or pain does not improve within a week, that also warrants a check-up.
Testicular pain can come from many sources—an infection, a twisted testicle, or an injury—most of which are not cancer but do need treatment. A doctor can usually tell the difference with a physical exam and an ultrasound, which takes about 10 to 15 minutes and uses sound waves to create an image of the inside of the testicle. Ultrasound is painless and the standard way to evaluate any lump or swelling.
If your regular doctor is unsure, they may refer you to a urologist, a surgeon who specializes in the male urinary and reproductive system. A urologist has extra training in testicular conditions and can perform a more detailed exam if needed.
Other symptoms that may appear later
If testicular cancer has been growing for a while without being caught, other symptoms may develop. These include a persistent cough or chest pain (if cancer has spread to the lungs), back pain (if it has spread to lymph nodes in the abdomen), or headaches and confusion (if it has reached the brain). Swelling in the legs or abdomen can occur if cancer blocks lymph drainage.
These later symptoms do not mean the cancer is untreatable—treatment outcomes depend on the type of cancer and how far it has spread, not on when symptoms started. But they do mean the cancer has had more time to grow. This is why catching a lump or swelling early, before other symptoms appear, gives the best chance for simpler treatment and faster recovery.
Some men have no symptoms at all and discover testicular cancer only during an ultrasound or exam done for another reason. This is less common but does happen, which is another reason why regular self-exams and routine doctor visits matter.
Conditions that mimic testicular cancer symptoms
Many conditions cause testicle swelling, pain, or lumps that are not cancer. An epididymitis (infection of the epididymis) causes pain and swelling and is treated with antibiotics. A hydrocele is a collection of fluid around the testicle that makes the scrotum feel swollen but is usually painless and often goes away on its own. A varicocele is enlarged veins in the scrotum, which can feel like a "bag of worms" and may cause a dull ache.
Testicular torsion is a twisted testicle that causes sudden, severe pain and requires emergency surgery to untwist it and save the testicle. Spermatoceles are small, benign cysts in the epididymis. Cysts on the testicle itself are also common and benign. All of these can be felt as lumps or swelling, but ultrasound can distinguish them from cancer.
The point is not to panic if you feel something unusual. Most testicular lumps and swelling are not cancer. But the only way to know for certain is to have a doctor examine you and, if needed, order an ultrasound. That exam is quick, painless, and will either rule out cancer or catch it early enough that treatment is straightforward.
Risk factors that increase your chances
Testicular cancer is rare overall, but certain factors make it more likely. A personal history of testicular cancer in the other testicle raises risk significantly. A family history of testicular cancer—especially in a father or brother—also increases risk. Men with a testicle that did not descend into the scrotum during development (called an undescended testicle or cryptorchidism) have higher risk, even if it was surgically corrected.
Age matters too. Testicular cancer most often appears in men between 15 and 35, though it can occur at any age. Men who are taller or have a higher body weight may have slightly elevated risk, though the reason is not fully understood. Having had certain fertility problems or infertility has also been associated with testicular cancer in some studies.
Knowing your risk does not change what to do: self-exams and prompt evaluation of any change remain the best approach. If you have a family history or a personal history of testicular cancer, mention it to your doctor so they can advise you on how often to check yourself or have a professional exam.
What happens after a doctor finds something
If a doctor feels a lump or sees something suspicious on ultrasound, the next step is usually a blood test to measure tumor markers—proteins that testicular cancer cells often produce. These markers are called AFP (alpha-fetoprotein) and beta-hCG (human chorionic gonadotropin). Elevated levels suggest cancer is present, though some benign conditions can also raise them slightly.
If cancer is suspected, a surgeon will remove the entire testicle through an incision in the groin (called a radical inguinal orchiectomy). This is the standard way to diagnose testicular cancer with certainty and remove it at the same time. The surgery is usually done as an outpatient procedure, meaning you go home the same day. Removing one testicle does not affect fertility or sexual function in most men, though some experience a slight decrease in testosterone that can be managed with hormone replacement if needed.
After removal, the testicle is examined under a microscope to determine the type of cancer, how fast it was growing, and whether it had started to spread. This information guides decisions about whether further treatment—such as chemotherapy, radiation, or surgery to remove affected lymph nodes—is needed. Many testicular cancers are caught early and do not require treatment beyond surgery.
Frequently Asked Questions
Can testicular cancer be painless?
Yes. Many men with testicular cancer feel no pain at all—they notice only a lump, swelling, or a change in how the testicle feels. Pain is not required for cancer to be present, which is why any change in size, texture, or weight matters and should be checked by a doctor.
Does a lump always mean cancer?
No. Most testicular lumps are benign cysts, fluid collections, or scar tissue. Ultrasound can usually tell the difference between a benign lump and cancer, and many benign lumps do not need any treatment at all. A doctor's exam is the only way to know for sure.
How fast does testicular cancer grow?
Growth rate varies by type. Some testicular cancers grow slowly over months; others grow quickly over weeks. This is another reason why noticing a change and seeing a doctor promptly matters—it gives you the best information about what you are dealing with and what treatment may be needed.
What if I find a lump but I am embarrassed to see a doctor?
Doctors examine testicles routinely and are not judgmental. A five-minute exam could catch cancer early or rule it out entirely. The risk of delaying far outweighs any embarrassment, and most men who go through the exam say it was much less awkward than they expected.
Can I get testicular cancer from an injury?
An injury does not cause testicular cancer, though an injury may draw attention to a lump or swelling that was already there. If you injure a testicle and swelling or pain does not improve within a week, see a doctor to make sure nothing else is wrong.