Nummular eczema is a dermatitis (eczema) in which itchy, coin-shaped spots or patches appear on the skin. The word nummular is Latin for "resembling coins."
Eczema - discoid; Nummular dermatitis
The cause of nummular eczema is unknown. But there usually is a personal or family history of:
Things that can make the condition worse include:
Symptoms may include any of the following:
Exams and Tests
Your health care provider can usually diagnose this condition by looking at your skin and asking about your family's medical history.
A skin biopsy may be needed to rule out other similar conditions. Allergy testing may be done.
Eczema is often treated with medicines applied to the skin. These are called topical medicines, and may include:
You may also be asked to try the wet wrap treatment. This involves the following steps:
The following measures may help improve your symptoms or prevent them from returning if your skin has cleared:
Nummular eczema is a long-term (chronic) condition. Medical treatment and avoiding irritants can help reduce symptoms.
A secondary infection of the skin may develop.
When to Contact a Medical Professional
Contact your provider if you have symptoms of this condition.
Also contact your provider if:
There is no known way to prevent the disorder.
Habif TP. Eczema and hand dermatitis. In: Habif TP, ed. Clinical Dermatology: A Color Guide to Diagnosis and Therapy. 6th ed. Philadelphia, PA: Elsevier; 2016:chap 3.
James WD, Elston DM, Treat JR, Rosenbach MA, Neuhaus IM. Eczema, atopic dermatitis, and noninfectious immunodeficiency disorders. In: James WD, Elston DM, Treat JR, Rosenbach MA, Neuhaus IM, eds. Andrews' Diseases of the Skin. 13th ed. Philadelphia, PA: Elsevier; 2020:chap 5.
Review Date: 4/16/2019
Reviewed By: Michael Lehrer, MD, Clinical Associate Professor, Department of Dermatology, University of Pennsylvania Medical Center, Philadelphia, PA. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.
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