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Tlc Foundation: What Is Trichotillomania?
From an organization that is devoted to ending the suffering of hair pulling and skin picking comes excellent information on exactly what these behaviors are, support for people who suffer from them, and up-to-date information on treatment.
Mayo Clinic
Mayo Clinic: Trichotillomania
Severe cases consist of repeatedly pulling hair out from all areas of the the body. Most of the time this type of disorder is hid from others. The Mayo Clinic provides a definition, symptoms, causes, risk factors, treatments and drugs.