What is Ringworm?

Ringworm is called different names depending on what part of your body is infected. When it affects the skin on the body in general, it is called tinea corporis. When it affects the scalp it is called tinea capitis. The infection of the groin area is called tinea cruris (jock itch). Ringworm infections of the feet are called tinea pedis (athlete's foot).

Causes

Ringworm, like all fungi, grows in warm, moist areas. It is contagious via direct body contact. It can be transmitted from animals to humans as well. Cats are one of the most common carriers that transmit ringworm to humans.

According to the National Institutes of Health (NIH), "Ringworm is more likely when you have frequent wetness (such as from sweating) and minor injuries to your skin, scalp, or nails."

Appearance

Ringworm appears as a dry, red raised area on the skin. It is usually round with a small area of clear skin in the center. It can spread from one area of the body to another and may eventually cover large areas of the body.

If it grows on the scalp or areas of facial hair it can cause baldness in affected areas.

Symptoms

Other than the appearance of the infection, the main symptoms include itching and possible blistering. Nails that get infected become discolored and may begin to crumble or fall apart.

Diagnosis

Doctors are generally able to diagnose ringworm by a visual inspection of the area. Fungal cultures can also confirm the diagnosis if there is any concern that it may be something besides ringworm. According to the NIH another diagnostic method is sometimes used, "...the fungus may appear florescent when your skin is examined with a blue light (called a Wood's lamp) in a dark room."

Treatment

Ringworm can be treated with over the counter antifungal creams. Medicated creams for athlete's foot or jock itch treat ringworm, as they are all caused by the same fungal infection. If it has persisted for more than four weeks of antifungal cream treatment a doctor may need to prescribe stronger antifungal medication. If ringworm is causing bald spots you should see a doctor for treatment.

Prevention

According to the NIH, the best ways to prevent ringworm are: keep your skin and feet clean and dry; shampoo regularly, especially after haircuts; do not share clothing, towels, hairbrushes, combs, headgear, or other personal care items; wear sandals or shoes at gyms, lockers, and pools; and avoid touching pets with bald spots.

Warning

This article is for information purposes. If you suspect you have ringworm or a similar condition it is recommended that you consult a medical professional.

Medline Plus: Ringworm