Nummular eczema may look like ringworm or psoriasis. The borders of ringworm and psoriasis are usually sharply defined. The lesion borders are indistinct in this case of nummular eczema.

The most common areas are the dorsa of the hands, the lower legs, the upper extremities (shown here), and the trunk. Men are most commonly affected.

Sharply circumscribed erythematous plaque with weeping surface. Nummular dermatitis may be a solitary lesion, but more frequently there are multiple similar lesions.