This is a habit that arises from the frustration of unfulfilled desires. Nail biting is one form of self-harm that involves damaging one's own body. By trying to cope with stress that cannot be resolved internally, individuals attempt to restore mental balance through physically harming themselves. In many cases, individuals are prohibited by parents and as they grow mentally, their self-control increases, leading them to stop nail biting. People who continue to bite their nails when they have spare time as adults may have a delicate and easily wounded personality. Emotionally immature, they are vulnerable to stress at work and in relationships with others, and are easily saddened by minor issues. They strongly seek affection from those who understand them.