PID is an infection in the upper genital tract (the womb, fallopian tubes or ovaries) that can cause pelvic or abdominal pain, heavy periods and bleeding after sex or between periods. It is a common condition, but often doesn’t cause any obvious symptoms.
PID is commonly caused by a bacterial infection that starts in the vagina or cervix (neck of the womb). If it is not treated early, it can spread to the womb (uterus) lining and then to the reproductive organs. There are many bacteria that can cause PID, some of these are sexually transmitted diseases, such as chlamydia and gonorrhoea, and others are bacteria that normally live in your vagina.
If you suspect you may have PID, go and see your GP, who will be able to recommend appropriate treatment. Read about how to get the most out of your GP appointment here.