In my experience, you just have to figure it out as you go. The BRAT diet works great for my son and husband when they have had a stomach bug, but it just about kills me if I'm in a flare. White bread with jam, muffins, waffles, pancakes and syrup, that's the kind of stuff that my system is able to digest the easiest with the minimum of pain. Others will have different items. Keeping a written journal is the best way to know for sure, it's worth the hassle!
diagnosed 11/06, solving the mystery of years of on/off abdominal pain. No more "it's just a virus". 33f with 2 boys, a lovable dog, and a wonderful husband. 150 mg Imuran, bowel resection 9/07, healing well and feeling well. Entocort 9mg.