Many conditions can cause symptoms similar to those of pelvic inflammatory disease (PID).

Other problems with the reproductive organs that may cause symptoms similar to PID include:

• Ectopic pregnancy.
• Endometriosis.
• Uterine fibroids.
• Ruptured, swollen, or bleeding ovarian cyst.
• Twisting of a tube and ovary (torsion).
• Pain when an egg is released from an ovary during ovulation (mittelschmerz).
• Menstrual cramps.

Medical conditions not related to the reproductive organs that may also cause symptoms similar to PID include:

• Appendicitis.
• Digestive tract infection or inflammation (gastroenteritis).
• Gallbladder infection or inflammation (cholecystitis).
• Kidney stones (nephrolithiasis).
• Other digestive tract problems (ulcer, diverticulitis, irritable bowel syndrome).
• Pancreas infection or inflammation (pancreatitis).