I am surprised because when I went to a naturalpath that was the first thing that she said was very nutritious and good for Crohns, I lived on them as a safe food. I recently avoided a possible blockage from a fatty turkey. Most times it is what we dress things with, like beans or butter, sour cream, or dairy products that are usually the culprit. Once you get into a flare from something you ate, it can take a while to settle it. What else did your husband have besides Sweet potato?? It just baffling to me. I know the pain from something you ate, and at that point you care what caused it, just make the pain go away! Let us know what he consumed.