Athlete's foot is a common fungal infection that affects many people at some time in their lives. The condition easily spreads in public places such as communal showers, locker rooms and fitness centers.

Athlete's foot usually affects the spaces between your toes, but it can spread to your toenails and the soles and sides of your feet. Often, athlete's foot responds well to over-the-counter (nonprescription) treatments you can apply to your skin. More severe cases may require prescription medications.