Clinical pearl: benzethonium chloride for habit-tic nail deformity.

Treatment of habit-tic nail deformity is challenging, as it often requires both patient awareness and behavioral changes that may be long-standing. Many treatment options have been suggested, but limitations include inadequate supporting evidence and potential adverse effects. Herein, we describe the use of benzethonium chloride as a safe and effective treatment of habit-tic nail deformity.