Lower left abdomen/back pain, i have interstitial cystitis, endometriosis, ibs, and pfd. the pain is unbearable, can any of these be the cause? help:(

Any Could be: All of them can cause symptoms. It is sometimes difficult to figure out which is causing symptoms at any given time. A pelvic ultrasound is the place to start since certain problems can actually be visualized. Then deciphering some of the specific other symptoms or lack of symptoms can help figure out what is happening.

Back Pain: Could be unrelated. As with most pain conditions, there can be a variety of potential problems that can cause the pain that you are describing. It is difficult to diagnose with the short description given and without a proper physical examination. Pain is often a sign of inflammation. A qualified pain specialist should be able to help.