Pelvic inflammatory disease (PID) can cause abdominal pain in women.

Pelvic inflammatory disease (PID) is an infection of the female reproductive system. PID is usually caused by a sexually transmitted disease like gonorrhea or chlamydia, but infection causing bacteria may enter the from other activity in the genital area. Chronic pelvic or lower abdominal pain in women caused by Pelvic Inflammatory Disease may be accompanied by pain during sex, unusual vaginal discharge, fatigue, fever, vomiting or diarrhea.