J.S.
Hi D., We had issues with red food coloring for a while. Our middle daughter was sensitive to red food coloring until she was about 5. She eventually grew out of it and it doesn't bother her anymore. She would get red cheeks and hives (especially around her mouth). Red food coloring is in a lot of products! We even found it in vanilla frosting and some red meats. :) Just read the labels and avoid it for a while. It's good that you are still going to the allergist to rule out other things too. It is possible and I'm sure you'll do great!