In my inner thighs towards my butt I get these pimple looking sores, they are raised and almost feel like a sist if you push on it. The only time it hurts is if you put pressure on it. Sometimes it will have a white head and pop like a pimple, sometimes almost like deadskin will peel off, but after it isn't raised anymore, it will leave a bruise or a dark mark. It is usually just in my upper inner thigh but they will occasionally show up in different places on my body. I am not sexually active and never was so I don't think it could be an STD, but Im not sure..