Many times! 30 year poucher here. I think it's usually bile related. I never know for sure. Stay hydrated and use your judgement - if it dos not change within an amount of time YOU feel is ok, go to dr. or ER. I usually wait it out and it passes eventually. It still scares me a bit, but since it's happened off and on over the years and I'm still here, I don't freak out as much. Sometimes, no matter how hard I try to figure out what caused it, I can't. That's what drives me nuts about pouch - unlike many on these forums - my pouch reactions seem to have no rhyme or reason. Avoiding this or that does not make much difference. Combining this and that food - not much difference. I hope it passes quickly - I've had it (I think) for as many as 5 days or so max and then it clears up. When I was working, I would have to stay home on those days. Please feel better soon!