Testicles, also called testes or balls, are oval-shaped organs that sit in a sac that hangs behind the penis. The main job of testicles is to make sperm and produce testosterone. Testosterone is the ...

Scrotal swelling refers to swelling of the scrotum. The scrotum is the sac of skin that holds the testicles. Sometimes, scrotal swelling may affect the entire scrotum. At other times, there may be ...