Nummular dermatitis is a type of eczema that causes round or “coin-shaped” patches of irritated skin. The name comes from the word “nummus,” meaning coin. It most commonly affects adults and is often seen on the legs, though it can appear on the arms or trunk as well.
These patches may be itchy, dry, red, or scaly, and can sometimes ooze or crust. Symptoms tend to come and go over time, with periods of flaring and improvement.
Why It Happens
Nummular dermatitis is associated with dry, sensitive skin. It may be triggered or worsened by:
- Age greater than 50 (especially over age 70)
- Medications that increase dry skin, including cholesterol and blood pressure medications
- Cold or dry weather
- Frequent hot showers or harsh soaps
- Skin irritation or minor injury
- Underlying skin dryness
Skin Care Basics
Consistent gentle skin care is the foundation of treatment:
- Use non-foaming, fragrance-free cleansers (such as CeraVe® Hydrating Cleanser)
- Avoid hot water; use lukewarm showers instead
- Apply a thick moisturizer (such as CeraVe cream or similar) at least twice daily, especially after bathing
- Choose creams or ointments over lotions, as they are more effective for dry skin
Treatment During Flares
When the skin becomes very itchy or inflamed:
- A topical steroid may be prescribed to reduce inflammation and itching
- Use as directed and only on active areas
- Once the itching and redness improve, stop the steroid and continue with moisturizers alone
Do not use topical steroids continuously for more than 3–4 weeks without follow-up, as prolonged use can lead to skin thinning and other side effects.
Long-Term Outlook
Nummular dermatitis is a chronic condition. While it cannot be permanently cured, it can be well controlled with proper skin care and intermittent treatment during flares.
Staying consistent with moisturization and avoiding triggers can significantly reduce how often flares occur.
Have questions about a stubborn, itchy patch like this? You can book online or call the office at 423-528-8833. This page is for general education, not a substitute for a personal exam.