Hives was not one of my symptoms before going gluten free. I had pain in my right side under my ribs. Ruled everything else out, dr. said eliminate gluten. I did, then also dairy because I kept getting the pain every time I ate dairy. Both have been out of my diet completely for around 2 weeks. Now suddenly I have been breaking out in hives! The other morning I only had coffee with non-dairy creamer and broke out. Today it was after a bowl of tomatoes and cucumbers with Catalina dressing! It's happened for 3 days now. Had to take Benadryl today. I also get itchiness in my mouth and throat. I do have seasonal allergies so, could it be that? I'm going crazy!! Will be making an appt. at an allergist but was just wondering if anyone has had anything similar happen.