<<Disclaimer: Verify this information before applying it to your situation.>> In response to the rash that your daughter has, I, too, get a rash. Usually the rash is on my legs and under my underarms. It will occur within 6 hours of my eating wheat or gluten. Celiacs can have the rash as well as the intestinal problem. This disorder is called dermatitis Herpetiformis. It is my early warning sign that I have to look for the wheat or gluten I have ingested. It can happen when I have eaten minute amounts of wheat. It can also occur across my stomach. I have a pain in the right side of my stomach as well. It is always in the same spot. Hope this helps.