Pain in the balls, also known as testicular pain. A common cause of testicular pain is inflammation of the testicles and epididymis. Inflammation of the testicular epididymis is usually caused by a bacterial infection. Patients with testicular epididymitis are usually accompanied by prostatitis, which is caused by incomplete treatment of bacterial prostatitis, so that bacteria infect the testicles and epididymis, causing testicular epididymitis. Testicular epididymitis usually has an acute onset and causes swelling and pain in the testicles, and touching the testicles with your hands will make the pain worse. Patients usually have a rapid onset, accompanied by symptoms of generalized fever, and usually need to go to the urology department for scrotal ultrasound and routine blood tests to clarify the diagnosis. It is usually necessary to pay attention to bed rest, lie flat and elevate the scrotum to help reduce the pain.