Eczema on the Feet: Presentation, Triggers, and Treatment

Foot Involvement in Atopic Dermatitis

Feet are a common site for eczema flares, especially in adults. The plantar surface, toes, and dorsum may be affected.

Clinical Features

• Dry, scaly patches; fissures (painful cracking).
• Intense pruritus → excoriations, lichenification.
• Vesicular (dyshidrotic) variant: deep-seated vesicles on soles/lateral fingers; "tapioca" appearance.
• Secondary infection: honey-colored crusting, weeping, cellulitis.

Triggers Specific to Feet

• Occlusive footwear (synthetic socks, rubber boots).
• Sweat (hyperhidrosis) and maceration.
• Contact allergens: leather tanning agents (chromate), rubber accelerators, adhesives, dyes.
• Friction, heat, fungal infection (tinea pedis) as cofactor.

Management

• Barrier repair: Thick emollients (petrolatum, ceramide creams) 2–3× daily; urea/salicylic acid for hyperkeratosis.
• Topical steroids: Mid-potency (e.g., triamcinolone 0.1%) for flares; taper to avoid atrophy.
• TCIs: Tacrolimus/pimecrolimus for maintenance/steroid-sparing.
• Footwear hygiene: Breathable socks (cotton, moisture-wicking), rotate shoes, avoid known allergens.
• Treat comorbid tinea: Topical antifungals if present.

Refractory cases warrant patch testing and dermatology referral.