Pelvic inflammatory disease is an infection of the upper female reproductive organs (the uterus, fallopian tubes, and ovaries). Typically, women have pain in the lower abdomen, a vaginal discharge, and irregular vaginal bleeding. Feb 13, - Pelvic inflammatory disease, or PID, is an infection of the organs of a women's reproductive system. They include the uterus, ovaries, fallopian tubes, and cervix. Pain in your lower belly and pelvis. Heavy discharge from your vagina with an unpleasant odor.