• (hair-pulling) A phenomenon in which persons repetitively pull out their own hair, resulting in noticeable hair loss.
  Human Phenotype Ontology (HPO)
  The Human Phenotype Ontology Project, 2025
• A disorder characterized by repetitive pulling out of one's hair resulting in noticeable hair loss; the individual experiences a rising subjective sense of tension before pulling out the hair and a sense of gratification or relief when pulling out the hair.
  NCI
  U.S. National Cancer Institute, 2021
• Compulsion to pull out one's hair.
  NLM Medical Subject Headings
  U.S. National Library of Medicine, 2025
• Trichotillomania is characterized by recurrent pulling out of one's hair resulting in hair loss. Patients with trichotillomania repeatedly pull or pluck out their hair for noncosmetic reasons. Most commonly, they pull hair from their scalp, eyebrows, and/or eyelids, but any body hair may be pulled out. Sites of hair pulling may change...
  Merck Manuals
  Merck & Co., Inc., 2025
• Trichotillomania (hair-pulling disorder) is characterized by the persistent and excessive pulling of one�s own hair, resulting in noticeable hair loss. Hair pulling can occur in any area of the body where hair grows.
  Medscape
  WebMD, 2025
• Trichotillomania (trik-o-til-o-MAY-nee-uh), also called hair-pulling disorder, is a mental disorder that involves recurrent, irresistible urges to pull out hair from your scalp, eyebrows or other areas of your body, despite trying to stop.
  Mayo Clinic
  Mayo Foundation for Medical Education and Research, 2025
• Trichotillomania is a disorder characterized by an overwhelming urge to repeatedly pull out one's own hair, resulting in hair loss (alopecia). It is classified under the obsessive-compulsive and related disorders category. Trichotillomania results in highly variable patterns of hair loss. The scalp is the most common area of hair...
  NIH Genetic and Rare Diseases
  National Center for Advancing Translational Sciences