16th July 2026

Clinical features

Discoid dermatitis is characterised as single or multiple, itchy, well-defined, coin-shaped, erythematous plaques with +/- vesiculation. It usually involves the lower legs, the forearm and the dorsum of the hand. It commonly affects young women and middle-aged adults. The cause of this is unknown; it is associated with contact allergy manifestation of atopy or localised injury.