Athlete’s foot — also called tinea pedis — is a contagious fungal infection that affects the skin on the feet and can spread to the toenails and sometimes the hands. The fungal infection is called athlete’s foot because it’s commonly seen in athletes.
Athlete’s foot isn’t serious, but sometimes it’s hard to cure. However, if you have diabetes or a weakened immune system and suspect that you have athlete’s foot, you should call your doctor immediately.
Athlete’s foot occurs when the tinea fungus grows on the feet. You can catch the fungus through direct contact with an infected person or by touching surfaces contaminated with the fungus. The fungus thrives in warm, moist environments and is commonly found in showers, on locker room floors, and around swimming pools.
Anyone can get athlete’s foot, but certain behaviors increase your risk. Factors that increase your risk of getting athlete’s foot include:
There are many possible symptoms of athlete’s foot. You may experience one or more of the following symptoms:
A doctor may diagnose athlete’s foot by the symptoms alone or may order a skin test if they aren’t sure if a fungal infection is causing your symptoms.
A skin lesion potassium hydroxide (KOH) exam is the most common test for athlete’s foot. A doctor scrapes off a small area of infected skin and places it in potassium hydroxide (KOH). The KOH destroys normal cells and leaves the fungal cells untouched so they are easy to see under a microscope.
Athlete’s foot can often be treated with over-the-counter (OTC) topical antifungal medications. If OTC medications don’t successfully treat the fungal infection, your doctor may prescribe topical or oral prescription-strength antifungal medications. Your doctor may also recommend home treatments to help clear up the infection.
There are many OTC topical antifungal medications, including:
Some of the prescription medications your doctor may prescribe for athlete’s foot include:
Your doctor may recommend that you soak your feet in salt water or diluted vinegar to help dry up blisters.
Tea tree oil (Melaleuca alternifolia) has been used as an alternative therapy for treating athlete’s foot with some success. A scientific study published in the August 2002 issue of the Australian Journal of Dermatology reported that a 50 percent solution of tea tree oil effectively treated athlete’s foot in 64 percent of trial participants.
Ask your doctor if a tea tree oil solution can help your athlete’s foot. Tea tree oil can cause skin dermatitis in some people.
Athlete’s foot can lead to complications in some cases.
Mild complications include an allergic reaction to the fungus, which can lead to blistering on the feet or hands. It’s also possible for the fungal infection to return after treatment.
There can be more severe complications if a secondary bacterial infection develops. If this is the case, your foot might be swollen, painful, and hot. Pus, drainage, and fever are additional signs of a bacterial infection.
It’s also possible for the bacterial infection to spread to the lymph system. A skin infection could lead to lymphangitis (infection of the lymph vessels) or lymphadenitis (infection of the lymph nodes).
Athlete’s foot infections can be mild or severe. Some clear up quickly, and others last a long time. Athlete’s foot infections generally respond well to antifungal treatment. However, sometimes fungal infections are difficult to eliminate. Long-term treatment with antifungal medications may be necessary to keep athlete’s foot infections from returning.
There are several things you can do to help prevent athlete’s foot infections. These include: