Nail biting can be a temporary, relatively non-destructive behavior that is merely an aesthetic issue, but it can also evolve into an uncontrollable and serious long-term problem, even becoming an obsessive-compulsive disorder. It is particularly prevalent among anxious individuals, when they feel nervous, tense, frustrated, stressed, bored, or even hungry. Quite challenging to break free from, here are some practical ways on how to quit this destructive habit : some focusing on behavior changes and others on physical barriers that can prevent nail biting.