Epididymitis is swelling (inflammation) of the epididymis, the tube that connects the testicle with the vas deferens.
Epididymitis is most common in young men ages 19 - 35. It is a major cause of hospital admissions in the military.
Epididymitis is usually caused by the spread of a bacterial infection from the urethra or the bladder. The most common infections that cause this condition in young heterosexual men are