Well, as far as I know, the icing on cake doesn't usually contain milk, it is mostly sugar, depending on the cake I think. That makes me wonder if you may have a gluten sensitivity. Maybe you could try eating cake without the icing and see what happens. Sometimes I can eat pizza every day and be fine, sometimes one piece will make me sick. I have found that at least for me, I can tolerate pizza from certain restaurants better than others, and the thinner the crust and less spicy the sauce, the better I tolerate it. But sometimes I just can't handle pizza no matter which one. My gut is very unpredictable. I eat cheese with no problems, but cannot handle any milk, ice cream, or yogurt. I also cannot seem to tolerate the Lactose free milk so I drink soy milk.
Diagnosed with Left-sided UC in 1995 at age 15,
Prednisone, Rowasa & Hydrocort. Enemas, Proctofoam, Sulfasalazine, Asacol, Probiotics, Fish Oil, Aloe Juice, Canasa, Enotcort, Colazol, Anamantle, Remicade, etc... had almost recto-vaginal fistula in 2004, put on Remicade, August 2007:Increased Remicade dosage-700mg every 6 weeks,diagnosed w/ Psoriatic Arthritis & Fibromyalgia Current meds: Clorazepate, Proctofoam HC, Glucosamine 500, Vitamin B, Lomotil, Tylenol pm, Lyrica started 1/17/08