I am addicted to biting my nails and the area around my nails & knukkles to the point of bleeding. (I know, yuck!) When not using my hands, they seem to unconsciously move to my mouth ready for picking or biting. I moved from Reddit to here and reddit has a subreddit called dermatophasia (https://en.m.wikipedia.org/wiki/Dermatophagia) that helped me not feel alone. When meeting people, I try to hide my fingers so they don’t see the scars of unconscious gnawing. The worst time for biting is when I sit in front of a TV; I am better off playing video games with a controller! See Video Games are healthier! Lol