Chronic pelvic pain is defined as pain that occurs below the umbilicus (belly button) that lasts for at least six months. It may or may not be associated with menstrual periods. Chronic pelvic pain is not a disease, rather, it is a symptom that can be caused by several different conditions.
Pelvic inflammatory disease is an infection caused by a sexually transmitted organism. Occasionally, it is caused by a previous ruptured appendix or scarring resulting from previous pelvic surgery. It can involve the uterus, ovaries, and fallopian tubes (which link the ovaries and uterus). Pelvic inflammatory disease can cause pain, abnormal uterine bleeding, and, when acute, symptoms of infection such as fever and chills.