In some patients, the hair is torn off with both hands or cut with scissors, which is called trichotillomania. People may not have a high awareness of this disease, so here is a brief introduction to the pathogenesis of the disease. It is thought that family dynamics may be a factor in the onset of hair-pulling fetish and in perpetuating the symptoms, such as parents with an impatient, passive temperament, not performing parental functions, and not having contact with their children; parents who are hostile or harshly health-searching with their children are the dominant pattern in families of female adolescent patients. Multiple fixations at various stages of psychosexual development may be the pathopsychological cause of this disorder. It has been reported that patients with hair-pulling fetish have a similar clinical presentation to OCD and a higher rate of OCD in their first-degree relatives, while the use of antidepressants that control 5-hydroxytryptamine, such as chlorpromazine and fluoxetine (fluphenazine), which control the symptoms of OCD patients, is equally effective in treating hair-pulling fetish; therefore, it is considered that hair-pulling fetish may be a subtype of OCD.