<unk>  is caused by long-term external trauma to the nail matrix as a result of skin-picking around the affected nail. The underlying cause is<unk> ual skin picking as a body-focused repetitive behavior which often worsens during times of stress, boredom, or inactivity. In the past,<unk>  has been linked to anxiety,<unk>  disorder, and obsessive-compulsive disorder. However, there is no preceding anxiety and subsequent relief felt by an individual after picking, differentiating it from compulsions associated with OCD.
Habit-tic deformity
Planovalgus deformity
Gibbus deformity
Swan neck deformity
Rocker bottom foot
Jammed finger
Ape hand deformity
Carpometacarpal bossing