Glad you emailed about this. Also don't be afraid to talk to your general doctor. If you want to be discreet you can always just mention it during your anual visit or the next time you get sick (or you can say you're sick and go in just for this).

I don't know if you're able to get a therapist but therapy can also address this issue.

Posting here and trying to figure out WHY you do it can help too. For me it took figure out why, dealing with those issue, and also a long period of breaking the cycle. Self injury can be an addiction, and it can be hard to break.