I have had Pouchitis and symptoms vary - but from what I have experienced- was no blood - ever. I am not sure, but I think blood in the stool is not a hallmark of Pouchitis. I guess if the inflammation gets bad enough it could ulcer and bleed. Cuffitis seems to sometimes be associated with bleeding, but that would not explain the high belly pain. A scope would be key here. I would assume a topical treatment could get the cuffitis under control if that is the culprit.