I have struggled with that issue for three years now. It is very hard to control and has become an impulse action for me. It is hard to over come but i have some people helping me and making it easier.
Self mutilation is very hard to control and to recover from. It is a daily battle and some loose their life to it. It is a complicated reaction to explain and many people don't understand it and think people are weird because they have this problem. I worked with someone who had this problem and she was a great person.