Hi, my fiance has Crohns and has had it for about 8 years now. He hasn't had an episode in along time. (Or so he says) But, today when I had gotten home, he has been in the bathroom since. He had told me it's been happening earlier today so by now its been 7 hours. But, he has had severe diarreha. I'm afraid he'll get dehydrated. So, when is should we be concern enough to take a trip to the E.R?