Module 11: Cosmetic and Psychodermatology
Learning Objectives
Section titled “Learning Objectives”A. Cosmetic Dermatology
By the end of this section, students should be able to:
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Define the scope and principles of cosmetic dermatology.
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Identify common cosmetic dermatological conditions (e.g., acne scars, pigmentation, hair loss, aging skin).
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Describe the pathophysiology underlying aesthetic skin concerns.
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List and explain the indications, contraindications, and complications of common cosmetic procedures:
- Botulinum toxin injections
- Dermal fillers
- Chemical peels
- Laser therapy
- Microneedling
- Hair transplantation
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Perform a basic cosmetic dermatology consultation including history-taking, examination, and patient counselling.
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Discuss ethical considerations in aesthetic practice, including informed consent and psychological screening.
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Recognize the importance of patient expectations and psychological readiness before cosmetic interventions.
Part A: Introduction to Cosmetic Dermatology
Section titled “Part A: Introduction to Cosmetic Dermatology”Overview
Section titled “Overview”Cosmetic dermatology focuses on improving the appearance of skin, hair, and nails. It includes both non-invasive and minimally invasive procedures aimed at treating aesthetic concerns such as aging, pigmentation, acne scars, and hair loss.
Common Conditions
Section titled “Common Conditions”- Acne scars
- Melasma and hyperpigmentation
- Wrinkles and fine lines
- Hair loss (androgenetic alopecia)
- Stretch marks
- Rosacea
- Seborrhoeic keratosis
- Actinic damage (photoaging)
Pathophysiology
Section titled “Pathophysiology”- Aging skin: Loss of collagen, elastin, and hyaluronic acid leads to wrinkles and sagging.
- Pigmentation disorders: Melanin overproduction or uneven distribution due to UV exposure, hormonal changes.
- Acne scars: Result from inflammation and dermal damage during acne healing.
- Hair loss: Hormonal (DHT-mediated), autoimmune (alopecia areata), or nutritional causes.
Diagnosis
Section titled “Diagnosis”- Clinical examination
- Dermoscopy
- Wood’s lamp for pigmentation
- Skin biopsy (if malignancy suspected)
- Trichoscopy for hair disorders
Management
Section titled “Management”-
Topical agents:
- Retinoids (anti-aging, acne)
- Hydroquinone, azelaic acid (pigmentation)
- Sunscreens (UV protection)
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Procedural interventions:
- Chemical peels
- Laser therapy (e.g., for pigmentation, hair removal)
- Botulinum toxin (wrinkles)
- Fillers (volume restoration)
- Microneedling (scars, rejuvenation)
- Hair transplantation
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Patient education:
- Skin care routines
- Avoidance of triggers (UV, irritants)
- Realistic expectations
Ethical Considerations
Section titled “Ethical Considerations”- Informed consent
- Managing unrealistic expectations (e.g., body dysmorphic disorder)
- Avoiding unnecessary procedures
Part B: Skin and Psyche — Psychodermatology
Section titled “Part B: Skin and Psyche — Psychodermatology”Learning Objectives:
By the end of this section, students should be able to:
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Define psychodermatology and its relevance in clinical dermatology.
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Classify psychodermatological disorders into:
- Psychophysiological disorders
- Primary psychiatric disorders with skin symptoms
- Secondary psychiatric disorders due to skin disease
- Cutaneous sensory disorders
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Explain the pathophysiological mechanisms linking psychological stress and skin disease (e.g., HPA axis, neuroimmune interactions).
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Identify common psychodermatological conditions such as:
- Trichotillomania
- Delusional parasitosis
- Psychogenic pruritus
- Depression and anxiety in chronic skin disease
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Conduct a psychosocial assessment in dermatology patients using validated screening tools (e.g., PHQ-9, GAD-7).
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Outline a multidisciplinary management plan involving dermatological, psychological, and pharmacological interventions.
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Demonstrate empathetic communication and counselling skills for patients with psychological distress related to skin conditions.
Overview
Section titled “Overview”Psychodermatology examines the relationship between psychological well-being and skin disorders. It explores the relationship between mental health and skin, and vice versa.
Classification of Psychodermatological Disorders
Section titled “Classification of Psychodermatological Disorders”-
Primary psychiatric disorders with skin symptoms:
- Delusional parasitosis
- Body dysmorphic disorder
- Trichotillomania (hair pulling)
- Dermatitis artefacta (self-inflicted lesions)
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Dermatological disorders with psychiatric comorbidity:
- Psoriasis
- Atopic dermatitis
- Acne
- Vitiligo
- Alopecia areata
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Psychogenic skin disorders:
- Psychogenic pruritus
- Neurotic excoriations
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Secondary psychological impact of skin disease:
- Depression, anxiety, social withdrawal
- Suicidal ideation in severe cases
Pathophysiology
Section titled “Pathophysiology”- Stress and skin: Stress activates the hypothalamic-pituitary-adrenal (HPA) axis, increasing cortisol and inflammatory cytokines, worsening skin conditions.
- Neuroimmune interactions: Skin has nerve endings and immune cells that respond to psychological stimuli.
- Psychosomatic feedback loop: Skin disease causes distress, which worsens the disease.
Diagnosis
Section titled “Diagnosis”- Clinical history: Emotional triggers, psychiatric history
- Psychological screening tools: PHQ-9, GAD-7
- Dermatological examination
- Referral to psychiatry/psychology
Management
Section titled “Management”-
Multidisciplinary approach:
- Dermatologist + Psychiatrist/Psychologist
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Pharmacotherapy:
- SSRIs for anxiety/depression
- Antipsychotics for delusional disorders
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Psychotherapy:
- Cognitive Behavioral Therapy (CBT)
- Habit reversal therapy
- EMDR (Eye Movement Desensitization and Reprocessing)
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Dermatological treatment:
- Symptom control (e.g., antihistamines, topical steroids)
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Patient education and support groups
Clinical Integration Tips
Section titled “Clinical Integration Tips”- Screen routinely for psychological distress in chronic skin disease
- Build rapport and trust
- Avoid dismissing symptoms as “just psychological”
- Use empathetic communication
The SCL-K-9 is a brief psychometric screening tool for general psychological distress commonly used in dermatology settings. It provides a quick assessment of critical mental health domains such as depression and anxiety in patients with skin diseases. Studies show it effectively identifies patients with significant non-psychotic disorders and reveals gender differences in distress levels. The tool’s compact format allows it to be used efficiently in routine clinical practice to screen for psychological distress in chronic skin disease patients, aiding timely identification and management of emotional challenges.
Multiple Choice Questions
Section titled “Multiple Choice Questions”Tap an answer to check yourself — the correct option and an explanation appear once you choose.
Q1 Which of the following is a contraindication for chemical peeling?
Active herpes simplex infection is a contraindication for chemical peeling because the procedure can trigger widespread viral reactivation (herpetic whitlow or disseminated HSV). Acne vulgaris, melasma, and post-inflammatory hyperpigmentation are all recognised indications for chemical peels.
Q2 Which neurotransmitter is most implicated in psychogenic pruritus?
Serotonin plays a central role in the modulation of itch pathways and mood; dysregulation of serotonergic signalling is implicated in psychogenic pruritus. This is why SSRIs can be effective in its management.
Q3 Which of the following is a primary psychiatric disorder presenting with skin symptoms?
Trichotillomania (compulsive hair pulling) is classified as a primary psychiatric disorder (obsessive-compulsive spectrum) that manifests with dermatological findings. Psoriasis, vitiligo, and acne are primary dermatological conditions that may carry psychiatric comorbidity.
Q4 Which cosmetic procedure is most appropriate for dynamic facial wrinkles?
Botulinum toxin temporarily paralyses the underlying muscles responsible for dynamic wrinkles (e.g., glabellar lines, crow's feet). Dermal fillers address volume loss and static wrinkles; laser resurfacing and chemical peels target skin texture and pigmentation.
Q5 Which skin condition is most commonly associated with depression and social withdrawal?
Psoriasis has among the highest rates of depression and social withdrawal of any dermatological condition, driven by its visible chronic plaques, unpredictable flares, and significant impact on quality of life. Seborrhoeic keratosis, tinea corporis, and molluscum contagiosum carry minimal psychosocial burden.
Short Answer Questions
Section titled “Short Answer Questions”SAQ 1: Botulinum Toxin Indications and Contraindications
Section titled “SAQ 1: Botulinum Toxin Indications and Contraindications”SAQ
List three indications and three contraindications for botulinum toxin use in cosmetic dermatology.
Reveal model answer
Indications:
- Glabellar lines (frown lines)
- Crow’s feet
- Hyperhidrosis
Contraindications:
- Neuromuscular disorders (e.g., myasthenia gravis)
- Pregnancy or lactation
- Active skin infection at the injection site
SAQ 2: Stress and Psoriasis
Section titled “SAQ 2: Stress and Psoriasis”SAQ
Describe the pathophysiological link between stress and worsening of psoriasis.
Reveal model answer
Stress activates the hypothalamic-pituitary-adrenal (HPA) axis, increasing cortisol and pro-inflammatory cytokines (e.g., TNF-α, IL-6). These cytokines exacerbate keratinocyte proliferation and immune dysregulation, worsening psoriasis.
SAQ 3: Body Dysmorphic Disorder and Cosmetic Dermatology
Section titled “SAQ 3: Body Dysmorphic Disorder and Cosmetic Dermatology”SAQ
What is body dysmorphic disorder (BDD), and how does it relate to cosmetic dermatology?
Reveal model answer
BDD is a psychiatric condition where a person is excessively concerned about perceived flaws in appearance, often minor or imagined. In cosmetic dermatology, patients with BDD may seek repeated procedures and have unrealistic expectations, requiring psychological evaluation before any intervention.
SAQ 4: Trichotillomania Management
Section titled “SAQ 4: Trichotillomania Management”SAQ
Outline the management of trichotillomania.
Reveal model answer
- Behavioural therapy: Habit reversal training
- Pharmacotherapy: SSRIs
- Psychiatric referral
- Dermatological care: Scalp protection, camouflage techniques
OSCE Stations
Section titled “OSCE Stations”OSCE 1: Cosmetic Dermatology
Section titled “OSCE 1: Cosmetic Dermatology”Scenario: A 32-year-old woman presents with concerns about pigmentation on her cheeks. She has a history of melasma and wants cosmetic treatment. Tasks: Take a focused history; perform a skin examination; suggest appropriate treatment options; discuss contraindications and precautions.
Self-assess against checklist
Tick each point you covered, then check your score.
- Takes history of onset, sun exposure, hormonal history (e.g., OCP use, pregnancy), and previous treatments.
- Identifies symmetrical brown patches on the malar area on examination.
- Recommends topical hydroquinone and daily broad-spectrum sunscreen as first-line treatment.
- Discusses procedural options: chemical peels, laser therapy.
- Explains contraindications for peels, including active herpes simplex infection.
- Advises strict sun avoidance and use of physical sunscreens to prevent recurrence.
OSCE 2: Psychodermatology
Section titled “OSCE 2: Psychodermatology”Scenario: A 25-year-old man presents with multiple excoriated lesions on his arms. He believes insects are crawling under his skin. Tasks: Take a psychiatric history; perform a dermatological examination; suggest investigations; outline management.
Self-assess against checklist
Tick each point you covered, then check your score.
- Takes history exploring delusions, psychiatric symptoms, and social history consistent with delusional parasitosis.
- Examines skin and notes linear excoriations with no primary lesions.
- Investigates to rule out scabies; requests drug screen and arranges psychiatric evaluation.
- Avoids directly confronting or reinforcing the delusion; builds therapeutic rapport.
- Initiates antipsychotic therapy and provides dermatological wound care.
- Refers to psychiatry for ongoing management.
OSCE 3: Psychosocial Impact of Acne
Section titled “OSCE 3: Psychosocial Impact of Acne”Scenario: A 19-year-old female with moderate acne reports feeling depressed and avoiding social interactions. Tasks: Assess the psychological impact; perform a dermatological assessment; suggest a management plan.
Self-assess against checklist
Tick each point you covered, then check your score.
- Uses a validated screening tool (e.g., PHQ-9) to assess the severity of depression.
- Grades acne severity on dermatological examination.
- Initiates appropriate acne treatment: topical retinoids for symptom control.
- Considers SSRIs if a depressive disorder is confirmed.
- Refers for CBT or psychological counselling to address social withdrawal and low self-esteem.
- Discusses realistic treatment timelines and importance of adherence.