Mosquitos have always been biting since I was a young girl.. When I turned seventeen and I would get "eaten" by mosquitos all of the bites were normal reactions--just little red itchy bumps--except one which always turned into a large welt about 3-4 inches in diameter, extremely itchy and painful, and very hot to the touch. Since then (I'm now 23) this has been the trend... EVERY TIME I get bit, one mosquito bite--it can be anywhere on my body (arms, legs, etc.)--will always swell up like this. On occasion it has even turned into a bruise. I went to the ER once and they said to just take benadryll. It's only a temporary fix and I don't mind taking it but it makes me tired. Does anyone know what this might be and why I have this reaction??