Cheek, Lip and Hand biting. Does anyone else do this? Probably unrelated, but I also wash my hands frequently. For some reason this bothers my neighbors to the point where they get very angry, but is something I have done my whole life. Recently this has become a problem causing hang-nails and finger picking, but this is rare for me bc I keep my hands as busy as possible. What kind of treatment is there for this type of behavior?