[Squirrel]

You can become addicet to self harming. I think of it like this :
When I hurt myself, it triggers something in my brain, like a sense of relief, and when I feel angry or sad or however I feel when I end up hurting myself, I want to feel that relief again, and to do that I need to hurt myself, and its that sense of relief you become addicted to, and since you only get it when you hurt, you become addicted to self harmng.