Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Trichotillomania ?
    ### Response:
    Trichotillomania is an impulse control disorder characterized by an overwhelming urge to repeatedly pull out one's own hair (usually on the scalp), resulting in hair loss (alopecia). The eyelashes, eyebrows, and beard can also be affected. Many affected individuals feel extreme tension when they feel an impulse, followed by relief, gratification or pleasure afterwards.
    