Epididymitis: Epididymitis is inflammation or infection of the epididymis that is usually caused by a bacterial infection. Two main groups of organisms are responsible for most cases of epididymitis; STD organisms and coliforms. Symptoms of epididymitis include abdominal pain, scrotal pain and swelling, painful urination, blood in the urine, urethral discharge, fever, chills, and nausea. Treatment is with antibiotics. The prognosis of epididymitis is dependant upon the timeliness of medical care.