How to Self-exam: Examine each testicle gently with both hands by rolling the testicle between the thumb and forefingers. Find the epididymis, the soft tube-like structures behind the testicle that collects and carries sperm and look for any lumps or irregularities. Look for any changes in size, shape, or texture. The function of the testicles is to produce sperm and male hormones,such as testosterone. Issues that can cause the testicles to shrink include: sexually transmitted infections (STIs), such as syphilis and gonorrhea, tuberculosis, mumps, and some other viral infections trauma to the testicles An STI may cause one or more of the following symptoms: difficulty urinating burning while urinating itchy rashes on or around the genitals However, depending on the infection, a person may experience no symptoms at all. If trauma to the testicles occurs, undergo a medical examination as soon as possible. Tips for good testicle health If someone discovers a lump on their testicle, they can talk to their doctor. Males should examine their testicles at least once a month to check for any abnormalities. Doctors usually recommend performing these examinations after a hot bath or shower. At this time, the skin of the scrotum is most relaxed, making it easier to feel the testicles within. self-examinations: Perform the test standing up. Look for any swelling in the scrotum. Gently feel the scrotal sac to find one of the testicles. Gently roll the testicle between the thumb and fingers to feel its entire surface. Repeat the process with the other testicle. Check carefully for any: small, hard lump or lumps swelling, soreness, or pain changes in size or texture changes in firmness A person may feel a cord-like structure, called the epididymis, at the base of each testicle. These bundled tubes carry sperm from the testicles. Testicular cancer is one rare but highly treatable disease involving the testicles. Certain issues and health conditions, such as testicular cancer, can cause changes in the size and shape of the testicles. Performing regular testicular self-examinations can help catch these diseases early and allow for the best chance of successful treatment. How do one avoid testicular infection naturally?