I have this reddish/brown rash covering a lot of my back and on my chest just under my pectorals. It also shows up at the creases of my elbows and it is on my neck, but not nearly as red on my neck. I am overweight and the rash on my chest is right where the flab folds over. It itches a lot at times. The skin is not raised. If I don't shower for a couple days, I can rub a lot of dead skin off of it in the shower. When I do shower every day, it will itch and I can see tons of small flakes coming off when I do scratch it. I use a body wash with aloe. I have had it for a little over two years. I don't have health insurance so I have never gotten it looked at. At some areas, it seems to have rather defined edges. What could this be?