For people with hair pulling, skin picking, and nail-biting, these behaviours have become automatic - and repeated - responses to triggers. These behaviours do serve a purpose, as coping/soothing mechanisms, but they don't serve us well! When we engage in these behaviours our brain does feel a momentary sense of relief, like a reward, which makes the brain want to do it again. And so we enter The Habit Loop
Habit Reversal Training (HRT) is a way of breaking "The Habit Loop" and undoing these habits, or behaviours.