Nummular dermatitis, also called nummular eczema, is a persistent but curable skin disorder characterized by coin-shaped patches. These lesions are frequently well-defined and itchy. They can either exude a clear fluid or be crusty and dry. Nummular dermatitis is most commonly caused by a skin injury, like an insect bite, abrasion, or burn; however, there are other reasons. The disorder can cause one or several areas of coin-shaped lesions, and the patches are designed to persist for several months.
Moreover, nummular dermatitis is more common in males than in females. Males generally have their first episode after age 50 and females before turning 30. Nummular dermatitis can occur in kids with severe atopic dermatitis (AD).