Nail biting is one of the most commin ‘oral compulsive’ habits, using the same mechanism as used by overeaters and smokers. ‘Oral satisfaction’ put simply involves putting something in your mouth, whether it is a cigarette, biscuit, or nail, especially when feeling anxious. Nail biting can therefore either be purely out of habit, or it could be due to an underlying anxiety. In most cases however, it is due to a combination of both factors. |