The Itch.

you are definitely not alone in this. i got put in a mental hospital for excessive cutting and they put me on this drug that actually helped. they use it for people who are addicted to heroine and shit. it cuts off the nerve receptors or something when you cut because cutting is addictive. ive been off of it for a while but it definitely helped and i dont get the urge as much or as strongly anymore. what i did was used rubber bands and ice which helped a little bit but in the end youre just going to have to use your willpower and your own personal inner strength to stop. i know its hard and although ive gotten better with not cutting as much i still do cut. its a hard process to quit but maybe you can try “The Butterfly Project” which helps some people stop self harming (just made shit worse for me but everyone is different) best of luck though!!!