Patients who come to the clinic with nummular eczema often ask, “I apply moisturizer diligently, so why is it getting itchier and spreading?” If coin-shaped round lesions, small blisters, scaling, and severe itching repeat, it is difficult to view this as simple skin dryness alone. Especially in seasons when the skin barrier is more likely to weaken, red lesions and itching can become more uncomfortable.
Why coin-shaped eczema develops
Nummular eczema often appears in round patches on the backs of the hands, arms, legs, and around the feet, and it may spread to multiple areas. The causes are difficult to summarize as just one factor. Genetic factors, metal allergies, a history of atopic dermatitis, bacterial or viral infections, skin dryness, stress, alcohol use, and reduced immune function may act together.
Moisturizer should be used according to the skin condition
If nummular eczema is understood only as a “disease caused by dryness,” management can go in the wrong direction. If the area around the lesion is rough, has small rashes, and does not ooze, moisturizing may help protect the skin barrier. On the other hand, applying a heavy moisturizer thickly to areas with oozing, yellow scabs, and heat can worsen stuffiness, stinging, and itching.
We look at inflammation and overall condition together
During periods of severe itching and inflammation, steroid ointments, antihistamines, immunomodulating medications, and other treatments may be needed, and if a secondary infection is suspected, antibiotic treatment may be considered. Do not stop medications you have already been prescribed on your own; adjust them in consultation with your medical team. In Korean medicine, we consider ways to help restore the body’s balance by looking not only at skin lesions, but also digestion, sleep, fatigue, stress responses, and qi-blood circulation.
We recommend a consultation in these cases
- When coin-shaped lesions keep recurring or gradually spread
- When itching disrupts sleep or scratching causes wounds
- When oozing, scabbing, pain, or a feeling of heat appears together
- When stinging and redness repeatedly worsen after applying moisturizer
- When symptoms clearly worsen after drinking alcohol, overwork, or stress
Managing nummular eczema begins not with “applying a lot of moisturizer,” but with “checking what stage the skin is in right now.” Hot showers, excessive scrubbing, frequent drinking, and lack of sleep can unsettle skin inflammation, so it is better to reduce them. If eczema has been recurring for a long time, we recommend looking beyond the skin surface and considering the body’s condition as well when making a treatment plan.