The testicles, or testes, are important for the production and storage of sperm until they’re mature enough for ejaculation. They also produce testosterone, which is responsible for sex drive, ...

Possible causes of one testicle being bigger than the other include epididymitis, epididymal cysts, a hydrocele, testicular torsion, and more. Treatment depends on the cause. Self-exams can help ...

A testicle lump, or testicular lump, is an abnormal mass that can form in the testicles. A testicular lump is a fairly common condition that can have many different causes. Testicular lumps can occur ...