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Biting at the Skin (Dermatillomania)

What is Biting at the Skin (Dermatillomania)?

Dermatillomania, also called excoriation disorder or skin‑picking disorder, is a mental‑health condition in which a person repeatedly bites, scratches, or otherwise damages their own skin. The behavior is often compulsive, providing temporary relief from tension, anxiety, or boredom, but it can lead to noticeable skin lesions, infection, and emotional distress. The condition is classified in the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM‑5) under Obsessive‑Compulsive and Related Disorders.<sup>1</sup>

While occasional “picking” is common, dermatillomania is distinguished by the frequency, intensity, and the negative impact it has on daily life. It can affect any body part, but the face, arms, and hands are most frequently involved. Because many people feel embarrassed, they may hide the lesions, making diagnosis and treatment more difficult.

Common Causes

Dermatillomania is multifactorial. The following conditions and factors are most frequently linked to the development or worsening of skin‑biting behavior:

• Obsessive‑Compulsive Disorder (OCD) – Shared neurobiological pathways and compulsive rituals.
• Anxiety disorders – Biting may serve as a self‑soothing technique during heightened stress.
• Depression – Low mood can reduce impulse control and increase self‑harm behaviors.
• Attention‑Deficit/Hyperactivity Disorder (ADHD) – Impulsivity and difficulty sustaining attention can trigger repetitive picking.
• Body‑Focused Repetitive Behavior (BFRB) spectrum – Includes trichotillomania (hair pulling) and onychophagia (nail biting).
• Skin conditions (e.g., eczema, psoriasis) – Itching or visible lesions may provoke biting as a coping response.
• Hormonal changes – Puberty, menstrual cycles, or menopause can increase urges.
• Substance use – Alcohol, nicotine, and stimulants may amplify impulsivity.
• Genetic predisposition – Family studies suggest a heritable component.
• Traumatic experiences – Early life stress can lead to maladaptive self‑regulation strategies.

Associated Symptoms

People with dermatillomania often notice a cluster of physical and psychological signs:

• Recurrent skin lesions: linear scratches, puncture wounds, or bite marks.
• Scarring, hyperpigmentation, or hypo‑pigmented patches.
• Infection: redness, warmth, pus, or foul odor.
• Hair loss or broken hair in the affected area.
• Increased tension or anxiety before the urge to bite, followed by a sense of relief afterward.
• Embarrassment, shame, or secretive behavior.
• Impairment in social, occupational, or academic functioning.
• Co‑occurring mental‑health symptoms: obsessive thoughts, compulsive rituals, or mood swings.

When to See a Doctor

While occasional skin picking is common, you should seek professional help if you notice any of the following:

• Skin damage that does not heal within two weeks.
• Frequent infections, fever, or swelling around the lesions.
• Significant scarring or disfigurement that affects self‑esteem.
• Increasing time spent picking (more than 30 minutes per day) or inability to stop despite attempts.
• Feelings of anxiety, depression, or suicidal thoughts linked to the behavior.
• Interference with work, school, or relationships.

If any of these red flags appear, schedule an appointment with a primary‑care physician, dermatologist, or mental‑health professional promptly.

Diagnosis

Diagnosing dermatillomania involves a combination of clinical interview, physical examination, and, when needed, standardized questionnaires.

1. Medical history and symptom review – The clinician asks about the frequency, triggers, and duration of skin‑biting, as well as any associated anxiety or mood symptoms.
2. Physical exam – A dermatologist assesses the location, depth, and stage of healing of skin lesions; swabs may be taken if infection is suspected.
3. DSM‑5 criteria – To meet the formal diagnosis, the behavior must be recurrent, cause distress or impairment, and not be better explained by another medical condition.
4. Screening tools – Instruments such as the Skin Picking Scale (SPS) or the Massachusetts General Hospital Hairpulling Scale (MGH‑HPS) help quantify severity.
5. Laboratory tests (when indicated) – CBC or culture if infection is present; thyroid panel if hormonal imbalance is suspected.

Treatment Options

Effective management typically blends behavioral therapies, medication, and self‑care strategies.

Psychological Interventions

• Cognitive‑Behavioral Therapy (CBT) – The gold‑standard treatment. It focuses on identifying triggers, restructuring thoughts, and developing healthier coping skills.
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• Habit Reversal Training (HRT) – Teaches a competing response (e.g., clenching fists) whenever the urge to bite arises.
• Acceptance and Commitment Therapy (ACT) – Helps patients accept urges without acting on them.
• Mindfulness‑Based Stress Reduction (MBSR) – Reduces overall anxiety and increases awareness of the picking urge.

Pharmacologic Options

Medications are not curative but can lessen urges and address co‑occurring conditions:

• Selective Serotonin Reuptake Inhibitors (SSRIs) – Fluoxetine, sertraline, or escitalopram have shown benefit in reducing compulsive picking.<sup>2</sup>
• Clomipramine – A tricyclic antidepressant with strong anti‑obsessional effects.
• Naltrexone (low‑dose) – Modulates the brain’s reward pathway; emerging evidence supports its use in BFRBs.<sup>3</sup>
• Antipsychotics (e.g., aripiprazole) – Considered for severe cases with obsessive‑compulsive features.

Dermatologic Care

• Topical antibiotics or antiseptics for infected lesions.
• Silicone gel sheets or scar‑reduction ointments to improve healing.
• Emollients to keep skin moisturized and reduce itch.
• Prescription‑strength steroid creams if an inflammatory skin condition (eczema, psoriasis) is a trigger.

Home‑Based Strategies

• Barrier methods – Wear gloves, adhesive bandages, or silicone finger guards during high‑risk periods.
• Keep hands busy – Stress balls, fidget toys, or knitting can reduce idle hand movements.
• Scheduled “pick‑free” periods – Use a timer to gradually increase uninterrupted time.
• Skin care routine – Gentle cleansing, moisturizing, and sun protection promote healing.
• Identify triggers – Keep a diary of mood, environment, and urges to spot patterns.

Prevention Tips

While complete prevention may not be realistic, these practical steps can lower the frequency and severity of skin biting:

• Develop a self‑monitoring journal – Record each episode, associated feelings, and location.
• Establish a calming routine – Deep‑breathing, progressive muscle relaxation, or brief meditation when anxiety rises.
• Modify the environment – Remove objects that provoke picking (e.g., rough fabrics, sharp nails).
• Maintain nail hygiene – Keep nails trimmed short to minimize damage if a bite occurs.
• Stay hydrated and eat balanced meals – Nutrient deficiencies can increase skin irritability.
• Regular physical activity – Exercise reduces overall stress levels.
• Seek early professional help – Initiating therapy before the behavior becomes entrenched improves outcomes.

Emergency Warning Signs

Key Take‑aways

Dermatillomania is a treatable condition that sits at the crossroads of dermatology and mental health. Recognizing the signs early, consulting a qualified provider, and embracing a multimodal treatment plan can dramatically improve skin health, emotional wellbeing, and overall quality of life.

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References:

1. American Psychiatric Association. Diagnostic and Statistical Manual of Mental Disorders, 5th ed. 2013.
2. Mayo Clinic. “Excoriation (Skin-Picking) Disorder.” Updated 2023. https://www.mayoclinic.org
3. Grant JE, et al. “Low‑dose naltrexone for the treatment of body‑focused repetitive behaviors.” J Psychopharmacol. 2021;35(8):960‑967.
4. Cleveland Clinic. “Trichotillomania and Other Body‑Focused Repetitive Behaviors.” 2022. https://my.clevelandclinic.org
5. National Institute of Mental Health. “Obsessive‑Compulsive and Related Disorders.” 2024. https://www.nimh.nih.gov

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