How can I approach someone that self harms?

Finding a good time with no distractions is a first step. Make sure whomever you are talking to about self harm realizes you care about and want to help them and that you are on their side.

Don’t point it out, believe me the person suffering won’t want you to be nosey about it and try to talk about it when you first approach them. If they want to open up to you in the future they will. Respect them, don’t ask to see cuts, scars or make comments such as “that looks really bad”, “what’s that?”, “how did you do that?” This usually will make the person self conscious and paranoid, instead act like the cuts and scars aren’t there, like I’ve already said, if they want to open up to you about their self harm they’ll do it on their own terms over time.