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Allergic contact dermatitis — DOccMed MCQ

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EasyOccupational DiseaseAllergic contact dermatitisDOccMed

A 30-year-old hairdresser with itchy vesicular hand rash improving on holidays. No eczema history. Patch test positive to PPD. What is the most likely diagnosis?

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Correct answer: B — Allergic contact dermatitis to PPD in hair dye

Positive patch test to PPD with vesicular rash improving on holidays points to allergic contact dermatitis. PPD is a common sensitiser in hairdressing.

Reference: HSE Dermatitis Guidance; RIDDOR