For some reason, ever since I was in the fifth grade I had this patch of raise skin on my arm. At first it was discolored and when I scratched it, the skin seemed to come off in a little small round scabs. But eventually it healed and left a little round brown mark. I'm now in college in my junior year and it suddenly started itching again. It only has it grown from the small circle that it was, but itches and when I scratch it the skin comes off in little small scabs like before. I now have a similar condition on my inner thigh and I don't know what's causing it or whites come or a how it spread. Please help me and tell me what I should do..