Trichotillomania (TTM) is a disorder of behavior corresponding to compulsively pulling his own hair. It causes alopecia on the part of the body concerned and, in the case of hair, can make the person completely bald. Some people consider trichotillomania as an Obsessive Compulsive Disorder (OCD) and a genetic abnormality could be a cause. However, to be considered an Obsessive Compulsive Disorder, it can not be caused by another disease or by intoxication (alcohol or drugs). Trichotillomania is often observed in children and adolescents, it may be a tic often associated with a situation of stress or anxiety. When the TTM continues into adulthood, the disease is more severe then and durable. Trichotillomania is relatively common, representing approximately 1% to 2% of the population in more severe cases (significant loss of hair) and 13% to 15% for less severe cases.