In the crook of both my arms (but moreso on the left arm)... near the elbow area, I have been itching badly. It isn t spreading and the horrible itching seems to come and go. At first, I thought maybe it was a sunrash as I am in the sun alot for tennis. Or perhaps a reaction to the sunblock I use. It keeps me up all night and is driving me crazy. In the affected area, the skin is raised, welted, and a little red. I itch and itch until I almost bleed. Could this be fungal, bacterial, rash? How do I know the difference? What are some treatments?