http://tinyurl.com/nails123 ← ← STOP NAIL BITING NOW Behavioral therapy is beneficial when simpler measures are not effective. Habit Reversal Training (HRT), seeks to "unlearn" the habit of nail biting and possibly replace it with a more constructive habit and has shown its effectiveness versus placebo both in children and adults.[8][9] In addition to HRT, stimulus control therapy is used to both identify and then eliminate the stimulus that frequently triggers biting urges