Symptoms and treatment
Orchitis (inflammation of the testicle) on its own is a relatively rare condition. It most commonly occurs in childhood as a complication of mumps, and in adults it typically develops as an extension of epididymitis (inflammation of the epididymis). The most common sign is a sudden swelling and hardening of the affected testicle. The affected side of the scrotum is usually very tender to the touch, the skin appears taut and red, and pain may radiate into the groin or lower abdomen. A fever is also common. Both epididymitis and orchitis are often accompanied by pain during ejaculation and blood in the semen. Blood may also appear in the urine. In more complicated cases, the inflammation can affect sperm production and reduce fertility.