Excoriation (Skin-Picking) Disorder

Definition & Core Features - Skin's Compulsive Story

• Definition: Recurrent skin picking causing noticeable skin lesions.
• Core Features:
  • Persistent, unsuccessful efforts to stop/reduce picking.
  • Clinically significant distress or impairment (social, occupational).
  • Not due to substance effects (e.g., cocaine) or other medical conditions (e.g., scabies, dermatitis).
  • Not better explained by another mental disorder (e.g., BDD, delusions, NSSI).

  ⭐ Skin picking is often preceded by tension and followed by relief or gratification.

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Epidemiology & Etiology - Itchy Origins Unveiled

• Prevalence: Lifetime ~1.4%-5.4%; higher in females.
• Onset: Typically adolescence, often with pre-existing skin conditions (e.g., acne).
• Comorbidity: OCD, trichotillomania, anxiety, depression common.
• Etiology: Multifactorial:
  • Genetics: Familial link to OCD & other OCRDs.
  • Neurobiology: Key neurotransmitters (serotonin, dopamine) implicated; dysfunction in frontal-striatal circuits.
  • Psychological: Stress/anxiety trigger. Maladaptive coping mechanism. Tension reduction.

⭐ Often begins in adolescence, frequently triggered by minor skin irregularities or perceived flaws.

Clinical Presentation & DSM-5 - Decoding Skin Distress

• Recurrent skin picking causing visible skin lesions (e.g., face, arms, hands).
• Persistent, unsuccessful attempts to decrease or stop picking.
• Causes clinically significant distress or impairment in social, occupational, or other important areas.
• Not attributable to substance effects (e.g., cocaine) or other medical conditions (e.g., scabies).
• Not better explained by another mental disorder (e.g., BDD, delusions in psychosis).

  ⭐ Skin picking is often preceded by tension and followed by relief or gratification.

Differential Dx & Comorbidities - Not Just Skin Deep

• Differential Diagnoses (DDx):
  • Dermatological: Eczema, psoriasis, acne, infections.
  • Psychiatric:
    • BDD (improving perceived appearance flaws).
    • Delusional parasitosis (infestation belief).
    • Substance-induced (e.g., stimulants).
    • ASD (stereotyped picking).
    • Factitious disorder; NSSI.
• Common Comorbidities:
  • OCD (frequently co-occurs).
  • Trichotillomania (TTM).
  • Anxiety disorders (GAD, social anxiety).
  • Depressive disorders (MDD).
  • BDD.

  ⭐ Significant overlap exists: high comorbidity with OCD and other Body-Focused Repetitive Behaviors (BFRBs) like trichotillomania.

Management Strategies - Healing Hands Approach

• Non-Pharmacological (First-line)
  • Habit Reversal Training (HRT): Core components - awareness training, competing response training, social support.
  • Acceptance and Commitment Therapy (ACT): Focus on accepting urges, values-based action.
  • Stimulus Control: Identify & modify triggers (e.g., mirrors, lighting, specific tools).
• Pharmacological Options
  • SSRIs: Fluoxetine (20-60 mg/day), Sertraline (50-200 mg/day). Often first-line medication.
  • N-acetylcysteine (NAC): 600-3000 mg/day (glutamate modulator, antioxidant).
  • Lamotrigine: 50-300 mg/day. Useful for mood lability or impulsivity.
  • Naltrexone: 25-100 mg/day. Reduces reinforcing pleasure/relief.

⭐ Habit Reversal Training (HRT) is the most evidence-based psychotherapy for excoriation disorder, demonstrating significant symptom reduction.

High‑Yield Points - ⚡ Biggest Takeaways

• Repetitive skin picking resulting in noticeable skin lesions is the primary feature.
• Repeated, often unsuccessful, attempts are made to decrease or stop the picking.
• The behavior causes clinically significant distress or impairment in social or occupational areas.
• It's not attributable to substance effects or a general medical/dermatological condition.
• It's not better explained by another mental disorder (e.g., delusions, body dysmorphic disorder).
• Key treatments: SSRIs (fluoxetine) and CBT, particularly Habit Reversal Training (HRT).