I have no idea what it is. It won't heal. It's right below my armpit. It's very red, itches, and hurts to touch. It bleeds a lot too and I end up using a lot of band-aids and no one knows why they disappear, but I'm too embarrassed to tell anyone. I know I should, please don't tell me that, just give me ideas of what it is. It's quite large, and very leaky. It's always oozing something. PLEASE HELP I'm only 14