For about a month, maybe more, I have been noticed a painless rash on the inside of my thighs. At first I thought it was stretch marks, but sometimes it looks like some of them disappear. There are always some there though. It looks and feels like cuts, like either an indent or a raised cut. They are also red. They are on the top of my butt too. This is really embarrassing for me because I don't want people looking at me thinking I have stretch marks. I'm 16 years old, 5'0 and weigh around 120 pounds.