I'm not a cutter and my "thing" isn't nearly as dangerous but I chew and tear the skin off around my nails until I bleed. It hurts like hell but I feel like I have to do it. I have scar tissue around my nails on all my fingers. It tends to get worse during hypomania episodes. OCD can be an issue for bp people. I definitely suggest not starting. A addicting behavior that is harmful can potentially go too far. And to be honest, when I'm doing the damage I don't think of how bad it is, but I'm extremely embarrassed about the way my hands look and feel. I would do anything to not bite my hands.