Cheek Biting Hurts- Help!

I’ve been a chronic cheek biter ever since I can remember. I normally get started when I find a “rough” place on the inside of my mouth. I then obsessively chew on my cheeks until the pain is just too much.

After every bout of this I end up with horrible sores in my mouth that last about two weeks. The pain is so bad I cannot talk or eat. I’ve tried OTC ibuprofen/NSAIDs and applying ice to help with the heat, but I’m desperately looking for a way to alleviate the pain and speed healing. Any ideas?