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Trichotillomania: Diagnostic Criteria, Course, and Evidence-Based Treatment

Trichotillomania (hair-pulling disorder) is classified under Obsessive-Compulsive and Related Disorders in DSM-5. It involves recurrent hair pulling resulting in hair loss, with significant distress or functional impairment.

DSM-5 Diagnostic Criteria

  1. Recurrent pulling out of one's hair, resulting in hair loss
  2. Repeated attempts to decrease or stop hair pulling
  3. Clinically significant distress or impairment in social, occupational, or other important areas
  4. Not attributable to another medical condition (e.g., dermatologic, alopecia areata)
  5. Not better explained by another mental disorder (e.g., body dysmorphic disorder, psychosis)

Clinical Features

  • Sites: Scalp (most common), eyebrows, eyelashes, pubic, perirectal, beard, limbs
  • Pulling styles: Focused (ritualistic, tension-relief) vs. automatic (unconscious, during sedentary activities)
  • Associated behaviors: Examining hair, root eating (trichophagia → trichobezoar), tactile rituals
  • Comorbidities: OCD, anxiety disorders, depression, BFRBs (skin picking, nail biting), tic disorders

Course & Prognosis

  • Onset: Typically childhood/adolescence (peak 10–13 years); can begin at any age
  • Course: Chronic, waxing/waning; may persist lifelong without treatment
  • Spontaneous remission: Rare in adults; more common in young children
  • Prognostic factors: Earlier onset, longer duration, comorbid OCD, automatic pulling style → poorer prognosis

Evidence-Based Treatment

First-Line: Cognitive-Behavioral Therapy (CBT)

  • Habit Reversal Training (HRT): Core component—awareness training, competing response (e.g., fist clenching), social support, stimulus control
  • Comprehensive Behavioral (ComB) Model: Assesses SCAMP domains (Sensory, Cognitive, Affective, Motor, Place) → tailored interventions
  • Acceptance & Commitment Therapy (ACT): Psychological flexibility, urge surfing
  • DBT skills: Distress tolerance, emotion regulation

Pharmacotherapy (Adjunctive or Monotherapy if CBT Unavailable)

  • N-acetylcysteine (NAC): 1200–2400 mg/day; best RCT evidence for reducing urge/pulling (glutamate modulation)
  • SSRIs: Fluoxetine, sertraline—modest benefit; mainly for comorbid anxiety/depression
  • Clomipramine: TCA with serotonergic effects; some evidence
  • Olanzapine: Low-dose; limited RCTs
  • Naltrexone: Opioid antagonist; case reports for trichophagia

Self-Management Strategies

  • Barrier methods: gloves, hats, bandages, textured fidgets
  • Stimulus control: remove mirrors, modify lighting, avoid "pulling stations"
  • Stress management: mindfulness, progressive muscle relaxation
  • Hair care: conditioners, scalp massage to reduce sensory triggers
  • Support groups: TLC Foundation for BFRBs (bfrb.org)

When to Refer

Severe hair loss, trichobezoar (abdominal pain, nausea), significant functional impairment, comorbid psychosis, treatment-resistant after 12–16 CBT sessions.

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