How can I prove my doctors wrong?

I was told that because of an accident that happened in the boy scouts and my tendency to punch things when I get angry, that I have developed cracks in my hands. These cracks hurt like crazy every day of my life and make my hands shake pretty badly. According to my doctors, these cracks are “never going to fully heal” and “the pain may never go away”. Well I’m tired of being told what I can and can’t fix. Can someone offer me some help on how to get my hands back to 100%?

I’ve already found other methods of releasing my anger and I don’t use the heavy bag at the gym anymore. Please don’t offer those as suggestions.