What is epididymitis?

What is epididymitis?

Epididymitis is inflammation (swelling and irritation) of the epididymis, a tube at the back of the testicle that carries sperm. This swelling can cause intense pain in the testicle. It can occur in men of any age, though it happens most often in men between the ages of 14 and 35. There are an estimated 600,000 cases of epididymitis in the United States each year.