Thankyou for your answer. I suspect it can be hives.? It's really puzzling and its a large source of stress for me.
I went to a skin doctor, who said that I don't have any serious skin condition. He said it is just because of hot weather and will heal on its own. I live in a backward state of India and food intolerance is unheard of here.
Although people know about food allergies but not one does about celiac disease. If I tell any doctor that I suspect I have allergy to gluten/wheat- everybody laughs.