Epididymitis - Symptoms and causes - Mayo Clinic OverviewSymptomsCausesRisk FactorsComplicationsPrevention Epididymitis (ep-ih-did-uh-MY-tis) is an inflammation of the coiled tube (epididymis) at the back of the testicle that stores and carries sperm. Males of any age can get epididymitis.Epididymitis is most often caused by a bacterial infection, including sexually transmitted …