It sounds like your peeling the skin is a nervous habit rather than “self-harm”. There may be more than one reason why you do this. Your cuticles could be extra dry, or you may do it when you’re nervous or stressed. Either way it’s a good idea to talk to your health care provider to find out if there’s something you can do to change your behavior since it’s a concern to you. In the meantime you might try applying lotion to your cuticles and reading about how to lower your stress.