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A.D.A.M. Medical Encyclopedia [Internet]. Atlanta (GA): A.D.A.M.; 2013.

A.D.A.M. Medical Encyclopedia.

Athlete's foot

Tinea pedis; Fungal infection - feet; Tinea of the foot; Infection - fungal - feet; Ringworm - foot

Last reviewed: May 15, 2013.

Athlete's foot is an infection of the feet caused by fungus. The medical term is tinea pedis, or ringworm of the foot.

Causes

Athlete's foot occurs when a certain fungus grows on the skin of your feet. The same fungus may also grow on the heels, palms, and between the fingers.

Athlete's foot is the most common type of tinea fungal infection. The fungus thrives in warm, moist areas. Your risk for getting athlete's foot increases if you:

  • Wear closed shoes, especially if they are plastic-lined
  • Keep your feet wet for long periods
  • Sweat a lot
  • Develop a minor skin or nail injury

Athlete's foot is easily spread. It can be passed through direct contact or contact with items such as shoes, stockings, and shower or pool surfaces.

Symptoms

The most common symptom is cracked, flaking, peeling skin between the toes or side of the foot. Other symptoms can include:

  • Red and itchy skin
  • Burning or stinging pain
  • Blisters that ooze or get crusty

If the fungus spreads to your nails, they can become discolored, thick, and even crumble.

Athlete's foot may occur at the same time as other fungal skin infections such as jock itch.

Exams and Tests

Your health care provider can diagnose Athlete's foot simply by looking at your skin. If tests are needed, they may include:

Treatment

Over-the-counter antifungal powders or creams can help control the infection:

In addition:

  • Keep your feet clean and dry, especially between your toes.
  • Wash your feet thoroughly with soap and water and dry the area carefully and completely. Try to do this at least twice a day.
  • To widen and keep the web space (area between the toes) dry, use lamb's wool. This can be bought at a drugstore.
  • Wear clean cotton socks. Change your socks and shoes as often as needed to keep your feet dry.
  • Wear sandals or flip-flops at a public shower or pool.
  • Use antifungal or drying powders to prevent athlete's foot if you tend to get it often, or you frequent places where athlete's foot fungus is common (like public showers).
  • Wear shoes that are well-ventilated and made of natural material such as leather. It may help to alternate shoes each day, so they can completely dry between wearings. Do not wear plastic-lined shoes.

If athlete's foot does not get better in 2 to 4 weeks with self-care, or frequently returns, see your health care provider. Your provider may prescribe:

  • Medicines to take by mouth
  • Antibiotics to treat bacterial infections that occur from scratching

Outlook (Prognosis)

Athlete's foot almost always responds well to self-care, although it may come back. Long-term medicine and preventive measures may be needed.

When to Contact a Medical Professional

Call your doctor right away if:

  • Your foot is swollen and warm to the touch, especially if there are red streaks. These are signs of a possible bacterial infection. Other signs include pus, drainage, and fever.
  • You have diabetes or a weakened immune system and develop athlete's foot.
  • Athlete's foot symptoms do not go away within 2 to 4 weeks of self-care treatments.

References

  1. Elewski BE, Hughey LC, Sobera JO, Hay R. Fungal diseases. In: Bolognia JL, Jorizzo JL, Schaffer JV, eds. Dermatology. 3rd ed. Philadelphia, Pa.: Elsevier Saunders; 2012:chap 77.
  2. Habif TP. Clinical Dermatology: A Color Guide to Diagnosis and Therapy. 5th ed. Philadelphia, Pa.: Elsevier Mosby; 2009:chap 13.

Review Date: 5/15/2013.

Reviewed by: Kevin Berman, MD, PhD, Associate, Atlanta Center for Dermatologic Disease, Atlanta, GA. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

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Copyright © 2013, A.D.A.M., Inc.

A.D.A.M., Inc. is accredited by URAC, also known as the American Accreditation HealthCare Commission (www.urac.org). URAC's accreditation program is an independent audit to verify that A.D.A.M. follows rigorous standards of quality and accountability. A.D.A.M. is among the first to achieve this important distinction for online health information and services. Learn more about A.D.A.M.'s editorial policy, editorial process and privacy policy. A.D.A.M. is also a founding member of Hi-Ethics and subscribes to the principles of the Health on the Net Foundation (www.hon.ch).

The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only — they do not constitute endorsementscof those other sites. © 1997–2011 A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.

Copyright © 2013, A.D.A.M., Inc.

What works?

  • Oral antifungal drugs for treating athlete's foot (tinea pedis)Oral antifungal drugs for treating athlete's foot (tinea pedis)
    Athlete's foot (tinea pedis) is a fungal infection of the feet that is easily spread and difficult to get rid of. This review compared different oral antifungal drugs (i.e. drugs taken by mouth), and it included 15 trials, involving 1438 participants. There are several different kinds of oral treatments, and the trials we found considered all the oral drugs used to treat athlete's foot. We found terbinafine and itraconazole to be more effective than placebo. And we found terbinafine to be more effective than griseofulvin. Griseofulvin is a treatment that was developed much earlier than the new treatments, such as terbinafine and itraconazole; these newer treatments tend to be most evaluated. Trials of other drugs were not large enough to show differences between them. All drugs had side‐effects; gastrointestinal effects were the most common.
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  • Athlete's foot, tinea pedis.

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