An uncomfortable condition usually caused by sexually transmitted infections (STIs), pelvic inflammatory disease can be seriously uncomfortable and may lead to further complications if left untreated.

Pelvic inflammatory disease (PID) is an infection in the uterus, fallopian tubes and/or ovaries. It occurs when bacteria move from the vagina to the cervix and, potentially, other parts of the body.

PID can lead to chronic pain or other serious health problems, such as infertility, due to the irreversible damage to reproductive organs caused by the infection, warned June Gupta, N.P., the Maryland-based senior director of medical services at Planned Parenthood Federation of America.

"PID is usually caused by bacterial sexually transmitted infections like chlamydia or gonorrhea," Gupta said. "These STDs can be cured easily with antibiotics, but many people don't know they have them because they usually don't have symptoms—that's why regularly getting tested for STIs is so important."

The symptoms of pelvic inflammatory disease

If you're experiencing any unusual symptoms and have recently had unprotected