Nonsuicidal self-injury (NSSI)--deliberate bodily harm without suicidal intent--is increasingly common among individuals of all ages. NSSI encompasses a wide variety of behaviors including but not limited to cutting, carving of the skin, scratching, burning, or swallowing toxic substances. Over less than two decades, NSSI has gone from what appeared to be a rather rare condition to one that has become an indelible part of the mental health landscape...