Tinea corporis is a fungal infection of the skin on the body, commonly referred to as ringworm. Despite the name, it is not caused by a worm. It is caused by dermatophyte fungi that infect the outer layer of the skin. ^[1][2][3]

The condition often appears as an itchy, ring-shaped, scaly rash with a more active edge and relatively clearer center. However, not every fungal rash looks perfectly circular, and several non-fungal skin diseases can mimic it. ^[1][3][4]

What are the symptoms?

Typical symptoms include itchy red patches or plaques, scaling, enlarging circular or oval lesions, and a border that may look more inflamed than the center. Some lesions remain small, while others expand over time. ^[1][2][4]

How does it spread?

Tinea corporis can spread from infected people, infected animals, shared items, or contaminated surfaces. Skin-to-skin contact, shared towels, sports such as wrestling, warm humid environments, and excessive sweating can all increase risk. ^[2][5]

How is it diagnosed?

Diagnosis is often suspected from the look and distribution of the rash. If needed, a clinician may examine skin scrapings under the microscope, order fungal culture, or perform other dermatologic tests. ^[1][3]

How is it treated?

Most limited cases are treated with topical antifungal creams. Treatment commonly lasts 2 to 4 weeks, depending on the product and response. More widespread disease may require oral antifungal treatment. ^[1][6]

What helps prevent spread?

Keeping the skin clean and dry, avoiding shared towels and clothing, changing out of sweaty clothes promptly, and washing towels and sports gear appropriately can help. ^[4][7]

When should you see a doctor?

Medical evaluation is appropriate if the rash spreads quickly, affects the face or genitals, becomes pus-filled, or fails to improve after a few weeks of appropriate treatment. ^[1][6]

FAQ

Is body ringworm contagious?

Yes. It can spread through infected people, animals, shared objects, or contaminated surfaces. ^[2][5]

Is every ring-shaped rash caused by fungus?

No. Eczema, psoriasis, and other skin conditions can look similar. ^[1][3]

How long does treatment take?

Topical treatment often takes 2 to 4 weeks, although the exact duration depends on the case and the product used. ^[1][6]

Can I use a steroid cream?

Not unless a clinician recommends it. Steroid creams can mask the rash and make fungal infection harder to recognize or treat properly. ^[1][4]

When should I see a doctor?

If the rash is widespread, resistant, pus-filled, involves the face or genitals, or may be affecting the scalp, you should seek medical care. ^[1][6]