Dyshidrotic Eczema (Pompholyx): Comprehensive Management Algorithm

Dyshidrotic eczema (pompholyx) is a chronic vesicular hand/foot dermatitis characterized by deep-seated pruritic vesicles on palms, lateral fingers, and soles. Flares are triggered by sweating, contact allergens, stress, and seasonal changes.

Diagnostic Criteria

• Recurrent crops of 1-2mm deep vesicles ("tapioca pudding" appearance)
• Intense pruritus, burning
• Symmetric distribution on palms/fingers/soles
• Resolves with scaling, fissuring, lichenification in chronic phase
• Exclude: Tinea (KOH prep), contact allergy (patch testing), scabies, pustular psoriasis

Stepwise Treatment Ladder

Tier 1: Foundation (All Patients)

• Gentle skin care: Fragrance-free cleanser, immediate post-wash moisturization (ointment > cream > lotion)
• Barrier protection: Cotton liners under vinyl/nitrile gloves for wet work; avoid latex
• Trigger avoidance: Identify via diary (metals, fragrances, preservatives, foods)
• Stress management: CBT, mindfulness, biofeedback (strong flare association)

Tier 2: Topical Anti-inflammatories

• High-potency TCIs (tacrolimus 0.1%, pimecrolimus 1%): First-line for maintenance; no atrophy risk
• Potent corticosteroids (clobetasol 0.05%, halobetasol 0.05%): Short bursts (2 weeks on/off) for flares; occlusion (gloves overnight) enhances penetration
• Topical PDE4 inhibitor (crisaborole 2%): Alternative for sensitive areas

Tier 3: Phototherapy

• Narrowband UVB (hand/foot units) — 2-3x/week; effective for refractory cases
• PUVA (psoralen + UVA) — more potent; higher carcinogenic risk
• Targeted excimer laser — localized disease

Tier 4: Systemic Therapy (Severe/Refractory)

• Alitretinoin (9-cis-retinoic acid): FDA-approved for severe chronic hand eczema; teratogenic (strict pregnancy prevention)
• Immunosuppressants: Methotrexate, cyclosporine, azathioprine, mycophenolate — specialist monitoring
• Biologics: Dupilumab (IL-4/13) — approved for atopic dermatitis; off-label for dyshidrotic; tralokinumab, upadacitinib emerging

Tier 5: Adjunctive

• Botulinum toxin A (palmar injections) — reduces hyperhidrosis trigger; 4-6 month duration
• Oral antihistamines (sedating at night) — for pruritus/sleep
• Topical antiseptics (chlorhexidine, dilute bleach baths) — if secondary colonization

Long-term Management

Chronic relapsing course. Maintenance: TCIs 2-3x/week, barrier protection, trigger avoidance. Multidisciplinary care (dermatology, allergy, psychology) for severe cases.