Picture: An illustration of the fungus that causes athlete's foot (tinea pedis) and a woman applying anti-fungal medication to her foot.
Athlete's Foot

Athlete's Foot

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Athlete's foot facts

  • Athlete's foot is a common dermatitis of the webs of the toes and soles of the feet.
  • When caused by a fungus, athlete's foot may spread to the palm, groin, and body.
  • Fungal infections of the feet are contagious and can be spread person to person or by walking on contaminated objects and floors.
  • Athlete's foot may cause foot itching, burning, pain, and scaling.
  • When athlete's foot is caused by a fungus, it can be treated with antifungal medications, many of which are available over the counter.
  • Keeping the feet dry by using cotton socks and breathable shoes can help prevent athlete's foot.

What is athlete's foot?

Athlete's foot is a very common skin condition that affects the sole of the foot and the skin between the toes. It is usually a scaly, red, itchy eruption and occasionally may be weepy and oozing. It affects the feet of athletes and nonathletes alike. Although it is frequently caused by a fungal infection, other causes may be indistinguishable without proper testing.

The medical name for athlete's foot caused by a fungus is tinea pedis. There are a variety of fungi that cause athlete's foot, and these can be contracted in many locations, including gyms, locker rooms, swimming pools, nail salons, airport security lines, and from contaminated socks and clothing. The fungi can also be spread directly from person to person by contact. Most people acquire fungus on the feet from walking barefoot in areas where someone else with athlete's foot has walked. Some people are simply more prone to this condition while others seem relatively resistant to it. Another colorful name for this condition is "jungle rot," often used by members of the armed services serving in tropical climates.

However, without proper growing conditions (a warm, moist environment), the fungus may not easily infect the skin. Up to 70% of the population may develop athlete's foot at some time during their lives. An infection by athletes foot fungi does not produce any resistance to subsequent infections.

Reviewed by William C. Shiel Jr., MD, FACP, FACR on 9/22/2011


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Learn how to prevent athlete's foot.

How to Prevent Athlete's Foot

Medical Author: Melissa Conrad Stöppler, MD
Medical Editor: William C. Shiel Jr., MD, FACP, FACR

Athlete's foot, medically known as tinea pedis, is a fungal infection of the skin of the feet. Despite its name, athlete's foot can affect anyone and is not restricted to those who play sports or participate in physical exercise. It is estimated that up to 70% of the population will have athlete's foot at some time in their lives.

Symptoms of athlete's foot include dry skin, itching, burning, and redness of the feet. The symptoms are often apparent in the skin between the toes, where the infection usually starts. Blistering, peeling, cracking of the skin, and bleeding may occur. Sometimes the affected skin can appear white and wet on the surface.

The fungus that causes athlete's foot can be found on floors and clothing, and the organisms require a warm, dark, and humid environment in order to grow. The infection spreads by direct contact with contaminated surfaces or objects. As the infection spreads, it may affect the soles of the feet or the toenails. The affected skin is also more vulnerable to bacteria that cause skin infection (cellulitis). This is particularly common in persons with diabetes, the elderly, and people with impaired function of the immune system.

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