Defining Nummular Eczema

Nummular eczematous dermatitis is a name given to a stubborn, itchy rash that forms coin-shaped patches on the skin. The word nummular means coin in Latin, hence the name nummular eczema. The lesions as they get older may clear in the center or become scaly and then resemble ring worm or psoriasis. Nummualr eczema is generally found on the arms or legs but may also be found on the trunk or buttocks. Nummular eczema is most common in older people with very dry skin. The condition tends to be chronic, with periods when it gets much better or worse.