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).


A patch of coin-shaped lesions on the body is the most prevalent and obvious sign of nummular dermatitis. Lesions commonly appear on the legs or arms, although they can progress to the hands and chest. They might be red, pink, or brown.

Other signs and symptoms might include:

  • Skin that is scaly, red, or irritated around the lesions
  • Oozing blisters that finally crust over
  • Sores that are extremely irritating and painful


By questioning you about your health records and visually evaluating your skin, your physician can diagnose nummular dermatitis. They might also request that a skin sample be collected by lightly scraping the skin.

  • A dermatopathologist will examine the skin cells to see if the rash is caused by nummular dermatitis or another skin disorder.
  • When your physician feels the lesions result from an allergic response, they might also do an allergy test. This examination is performed at the doctor’s office. It entails applying a patch to your skin and monitoring for a reaction.


Although the symptoms of nummular dermatitis might be irritating, they’re treatable with medications and lifestyle adjustments. It’s not infectious, which means you cannot contract it via direct skin contact with another person.

Your medical professional might prescribe topical therapies to assist in clearing up nummular dermatitis flare-ups. These ointments or creams, which are applied to your skin in various ways, include:

  • Calcineurin inhibitors
  • Antibiotics
  • Corticosteroids

Several persons with large regions of nummular dermatitis struggle to cover all locations with topical therapies. Healthcare practitioners might recommend UV light therapy two to three times each week, as well as oral corticosteroids.

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