About two months ago I got a small rash on my inner elbow, it started out as just tiny ( about the size of a pen tip) red bumps, in an area about the size of a quarter. It was VERY itchy. Now the skin around the rash is a brown-ish colour and the bumps only show up after I scratch it, and it still itches. But now I have the same thing starting in my belly button and between my brests. I also keep getting rashes with red bumps (about the size of a pencil eraser) and they itch very very badly, but goes away within a day, but keeps comeing back everynight. Does anyone know what any of these rashes are, what caused them, or what I might do to make them go away?