Originally Posted by p0w

Hide those razors and smack some sense into him, I mean you're his friend but don't go lightly on him if you truly care.

Originally Posted by Wicked

One of my ex girlfriends actually cut and I was the only one who knew about it. She cut her thighs and shit though, not her wrists. She used to tell me she heard voices in her head telling her to kill herself, which worried me quite a bit - so I managed to convince her to see the doctor. The doctor said that the auditory hallucinations and depression was probably due to lack of sleep, and prescribed her some melatonin. She started getting sufficient sleep and after a week or two she was no longer cutting and she was a happier person. We managed to get everything fixed and no one ever found out.

Tl;dr - There's alot of things that can cause someone to cut, seeing a doctor anonymously would maybe be a good idea. Although, over here in Ireland - Doctors aren't allowed to tell our parents if we don't want them to. Dunno what it's like for you guys outside.