Many people engage in behaviors that range from nail biting, thumb sucking, foot tapping to more physically harmful behaviors like teeth grinding, hair pulling or head banging. Habit disorders consist of stereotypical repetitive; seemingly driven and non-functional motor habits that often interfere with normal activities and may lead to injury to a body part. The majority of these behaviors are considered harmless and considered part of normal growth and development, but in some cases, the habit persists into adulthood and can be very distressing.
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