Ever since I was a kid I would bite big chunks of my lips and checks (on the inside of my mouth) whenever I get stressed or nervous . As a kid I even bit holes out of my actual lip and now have scars all over my lips. Recently I’ve been obsessively biting the inside of my mouth and today was biting inside my mouth but under my lip. I but super deep and felt a sharp pain and now my lip and part of my chin are completely numb like they are after going to the dentist. Has anyone else done this and knows how to stop? Or at least why it caused the numbness