[Tigereyes]

I would expect that it would depend on the doctor. Usually if they only notice old scars, they don't say anything at all. With new scars, it's difficult to say. While 17 is usually too young to go to doctor appointments alone, you are able to ask parents to step out of the room (and some doctors push parents to step out of the room for teens). If you do this, it's more likely that if your doctor says anything at all, it would be then. However, since you are a minor, the doctor can legally still tell your mom about self harm, but that hasn't been my experience, and most doctors won't. I have never had a doctor ask me about scars, even when I was a minor.