Nail biting, a chronic habit related to feelings of anxiety or boredom, is generally considered harmless — particularly when compared to habits like smoking or drinking. But doctors say the unsanitary ...

Compulsive nail-biting, skin-picking, hairpulling, and lip- and cheek-biting are among a range of body-focused repetitive behaviors, or BFRBs, that can become a source of distress, but new research ...