Nummular dermatitis

Published on 11/06/2015 by admin

Filed under Pediatrics

Last modified 22/04/2025

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Two oozing coin-shaped areas of nummular dermatitis.

Redness and scale in the dry form of nummular dermatitis.

CLINICAL FEATURES

Nummular dermatitis is characterized by coin-shaped plaques most commonly on the extremities and buttocks. Two forms are seen: a wet form with oozing and crusting and a dry form with erythema and scaling. Both forms are persistent, lasting months if untreated.

Pruritus is often severe, but occasionally is completely absent.

The wet oozing form must be differentiated from impetigo, and the dry form from tinea corporis. Most children with nummular dermatitis do not have atopic dermatitis, although some children with atopic dermatitis will have nummular-type lesions as well as the other typical skin changes.

TREATMENT

High-potency topical steroids are required. Lesions are difficult to resolve and treatment must be persistent, often requiring 4–6 weeks for clearing. Antihistamines may be required if pruritus is significant.