Age:25 6"2 240lbs, Only allergy is cat dander. I have been going through an issue for a while now seems like months. I can scratch anywhere on my body if i ever get an itch and nothing out of the norm would happen, but i have this bothersome itch on the bottom of my right arm that will come and go. When i scratch it, it bumps up. The bump's will get bigger from the scratching irritation so ill put anti itch cream to temporarily sooth the problem area but what is this i wonder?