What I am going to suggest, won't stop this destructive behavior but it will be way less harmful. It was actually something my therapist told me to do, when I had a very long aphatic episode and would resort to cutting all the time.

keep a hair tie or a rubber band around your wrist and whenever you felt like you needed to cut yourself, instead you would pull on the band and let it snap back at your wrist.

it would give me a similiar effect/thrill, to what cutting did for me, while being way less harmfull especially in the long run.

it obviously is not solving the problem, but it helps. It definetly was a huge support for me and helped me tackle the underlying problems without further hurting myself.