I'm 19 years old, Until last year I began getting some sort of severe rash all over my body (After I got medication for my piercings for my ears, I haven't taken those medications after) , I know I'm not allergic to any foods because I took an allergy test But It gets so severe that I can't help but itch, If I do not itch, It hurts to the point that it feels like hot charcoals burning and needles all over. I went to the hospital a lot of times, almost four times a month because of this. They give me medication that doesn't help, and brush it off as a rash or an allergic reaction once again. The cold sometimes trigger it, also exercising and sometimes the heat. Its so severe that sometimes I feel like tearing my skin off and after it finally stops (Usually takes three hours to go away) My body becomes puffy, I also recently got it on the side of my face and head. I can't stand it anymore...Could it be a disease or from the skin? I need help, thank you!