After my 2nd takedown (first failed because of an undetected leak), I got pouchitis right away. Each bout was always preceded by terrible pain in my tailbone area. My GI said I had a small sinus tract but that didn’t go anywhere, but it was located in the back of the pouch. After a couple of years we did a CT Scan and they found a pocket of air that was connected to the sinus tract. I went to Cleveland Clinic 3 years ago, where a great doctor did a MRI, saw where this abscess was pushing on the jpouch and was able to remove it. No more tailbone pain after that. Although I still have chronic pouchitis it is manageable now for me with Cipro and Flagyl. It might be worth getting a CT Scan done.