PID is an inflammatory condition affecting the uterus (womb), fallopian tubes and, occasionally, the ovaries.
It is usually caused by a bacterial infection, some of which are caught through sex. It can take weeks or months before symptoms develop.
Symptoms include lower abdominal pain, pain during sex, unusual discharge or vaginal bleeding.
There is no specific test for PID. Diagnosis is made by an internal examination by a doctor or nurse.
PID is treated with a course of antibiotics. Your partner(s) should also be treated to stop any infection being passed from one to another.
Most women with PID recover completely, especially if treated early. If left untreated, PID can have serious complications including pain, infertility and ectopic pregnancy.
See our patient information leaflet below for more information.