What’s the Difference Between Ringworm and Eczema?

Medically Reviewed By Joan Paul, MD, MPH, DTMH
Was this helpful?

Ringworm and nummular eczema may look similar. However, ringworm results from a fungal infection, whereas the cause of nummular eczema is unclear. Plus, ringworm is contagious but nummular eczema is not. Ringworm and nummular eczema can both cause a circular skin rash. Knowing how to identify the symptoms of each condition can help you to know when to contact a doctor and which treatment options may help.

Read on to find out more about ringworm and nummular eczema. This article looks at symptoms, causes, treatment options, when to contact a doctor, and more.

What are the symptoms of ringworm and eczema?

A person is moisturizing their leg.
Guille Faingold/Stocksy United

Ringworm and nummular eczema can look similar in appearance, but they also have notable differences.


Ringworm of the body, or tinea corporis, is a contagious infection that leaves an itchy, ring-shaped patch on the skin. It typically forms in the exposed areas of the torso, neck, and limbs.

The Centers for Disease Control and Prevention (CDC) lists the typical symptoms of ringworm in specific areas of the body as follows:

  • Tinea pedis: This refers to ringworm on the feet. It can cause:
    • redness or discoloration and swelling 
    • peeling
    • itchy skin between the toes
    • blistering, in severe cases
  • Tinea capitis: This is ringworm of the scalp. It usually looks like a scaly, itchy bald spot that is red or discolored. This spot can grow in size and multiply. This most commonly affects children.
  • Tinea cruris: This describes ringworm on the groin, sometimes called jock itch. It usually looks like scaly, itchy spots that are red or discolored.
  • Tinea barbae: This is when ringworm forms under a person’s beard. Symptoms include scaly, itchy spots that are red or discolored, as well as crusting and pus

Additional symptoms of ringworm can include cracked skin and hair loss. Symptoms of ringworm typically appear within 4–14 days of infection, according to the CDC.

Learn more about where in the body ringworm can affect.

Nummular eczema

Nummular eczema, also called discoid eczema or nummular dermatitis, is a skin condition that causes itchy, coin-shaped patches on the skin. It usually affects the legs, but it can occur in other areas.

The American Academy of Dermatology Association (AAD) provides the typical signs of nummular eczema as follows:

  • tiny bumps and blister-like sores, which are often the first sign 
  • coin-shaped raised spots
  • itchiness 
  • extremely dry skin
  • infection, which can look like yellow or golden crusts on the spots 

Learn more about the symptoms of nummular eczema.

How ringworm and eczema look on different skin tones

Nummular eczema can look different on different skin tones. People with darker skin tones may develop brown, purple, or pale spots. People with lighter skin tones may instead experience pink or red spots.

Ringworm can also look different in different skin tones. It typically looks red or pink on light-colored skin and brown or gray on darker skin.

The table below provides additional facts about ringworm versus eczema.

Ringworm Nummular eczema 
Appearance causes ring-like spots on your skincauses coin-shaped spots on your skin
Causeresults from a fungal infectionhas an uncertain origin
Transmissionis contagiousis not contagious
Treatmentresponds to antifungal drugsresponds to thick emollients

What do ringworm and eczema look like?

View the slideshow below for photos of ringworm and nummular eczema.



Aiman Khair/Shutterstock



BSIP SA/Alamy Stock Photo


Nummular eczema



Nummular eczema

Mohammad2018, CC BY-SA 4.0, via Wikimedia

What causes ringworm and eczema?

Ringworm and nummular eczema have different causes.


Ringworm results from infection with certain types of fungi, including Trichophyton rubrum, Trichophyton mentagrophytes, and Microsporum audouinii.

There are three main ways ringworm can spread:

  • Contact with a person who has ringworm: This may occur through clothing, towels, and other personal items.
  • Contact with an animal that has ringworm: Many types of animals can spread ringworm to people, including dogs, cats, and goats. 
  • Contact with infected surfaces: Ringworm fungi can live on surfaces, especially in damp areas such as public showers and locker rooms.

The following factors may also increase your risk of ringworm:

  • living in a tropical area
  • being in hot, humid weather
  • having obesity
  • having diabetes
  • taking part in a contact sport
  • wearing tight clothing 

Learn more about skin infections.

Nummular eczema

There is currently no known clear cause of nummular eczema.

However, there is sufficient evidence that some factors can act as triggers, including:

Certain medications may also trigger nummular eczema. These include:

  • interferon and ribavirin when you use both together to treat hepatitis C
  • tumor necrosis factor-alpha (TNF-alpha) blockers, an arthritis medication 
  • taking statins, which are cholesterol-lowering medications

What are the treatments for ringworm and eczema?

Ringworm and nummular eczema have different treatments.


Dermatologists typically treat ringworm with over-the-counter (OTC) and prescription antifungals. These could be gels, creams, or spray solutions.

Types include:

  • miconazole
  • clotrimazole
  • ketoconazole
  • naftifine
  • terbinafine
  • oral terbinafine or itraconazole for widespread infections 

Learn more about ringworm treatments.

Nummular eczema

Treatment for nummular eczema focuses on restoring the natural skin barrier and reducing dryness. Your dermatologist will typically recommend thick emollients, such as petroleum jelly (Vaseline). They may also provide antibiotics if you have signs of bacterial infection.

Additional remedies include:

  • Topical corticosteroids: These reduce inflammation and itching.
  • Topical calcineurin inhibitors: These reduce symptom flares. 
  • Sedating antihistamines: These can reduce eczema-related sleep problems and relieve itchiness associated with eczema.
  • Narrowband UVB light therapy: This uses a special light to clear the patches.
  • Systemic immunosuppressants and immunomodulators: These reduce inflammation, irritation, and itching.

These at-home remedies may also help clear nummular eczema:

  • applying undiluted sunflower oil directly to the skin immediately after bathing
  • putting virgin or cold-pressed coconut oil onto the patches
  • applying cold compresses to the affected skin

When should I see a doctor?

Contact your doctor if you have been treating ringworm or eczema with OTC medications for some weeks and have not seen improvement.

If you have symptoms of infection, such as pus or fever, seek immediate treatment.

How do doctors diagnose ringworm and eczema?

Your doctor or dermatologist may be able to diagnose ringworm and nummular eczema by performing a physical examination and asking you questions about your symptoms.

They may also perform a biopsy to confirm the diagnosis. This involves removing a sample of your skin to study it more closely under a microscope.

If your doctor or dermatologist suspects ringworm, they may also take swabs from the affected area to identify the type of infection.


Ringworm and nummular eczema are two separate skin conditions with some similar features.

Ringworm is a contagious infection that leaves an itchy, ring-shaped patch on the skin. It results from a fungal infection. Nummular eczema is a skin condition that causes itchy, coin-shaped patches on the skin. It has an unclear cause. 

Dermatologists use antifungals to treat ringworm. They recommend gentle skin care, routine emollient use, and sometimes topical or oral medications to treat eczema.

Contact your doctor if you have symptoms of ringworm or eczema. They will be able to confirm the diagnosis and advise on treatments.

Was this helpful?
Medical Reviewer: Joan Paul, MD, MPH, DTMH
Last Review Date: 2023 Mar 3
View All Eczema Articles
THIS TOOL DOES NOT PROVIDE MEDICAL ADVICE. It is intended for informational purposes only. It is not a substitute for professional medical advice, diagnosis or treatment. Never ignore professional medical advice in seeking treatment because of something you have read on the site. If you think you may have a medical emergency, immediately call your doctor or dial 911.
    1. How ringworm spreads. (2021). https://www.cdc.gov/fungal/diseases/ringworm/sources.html

    1. Oakley, A. (2020). Discoid eczema. https://dermnetnz.org/topics/discoid-eczema

    1. Overview: Discoid eczema. (2019). https://www.nhs.uk/conditions/discoid-eczema/

    1. Ringworm: Overview. (n.d.). https://www.aad.org/public/diseases/a-z/ringworm-overview

    1. Robinson, C. A., et al. (2022). Nummular dermatitis. https://www.ncbi.nlm.nih.gov/books/NBK565878/

    1. Shi, V. (2021). Alternative eczema treatments from natural oils to elimination diets. https://nationaleczema.org/blog/alternative-treatments-dr-shi/

    1. Symptoms of ringworm infections. (2021). https://www.cdc.gov/fungal/diseases/ringworm/symptoms.html

    1. Trayes, K. P., et al. (2018). Annular lesions: Diagnosis and treatment. https://www.aafp.org/pubs/afp/issues/2018/0901/p283.html

    1. Yee, G., et al. (2022). Tinea corporis. https://www.ncbi.nlm.nih.gov/books/NBK544360/