I am 17 years old and I recently discovered red, slightly raised marks on the top of my thighs, my abdominal area, my waistline, under my pubic hair, and two under my armpit. They kind of look like acne marks. I haven't used any new products recently, but I did just start to have sex with a new partner two days ago, I don't know if this has anything to do with it or not. It did recently get warmer where I live, and I just started baseball season so I have been sweating too.
Thanks for any help!