Cause
Athlete's foot (tinea pedis) is a
fungal infection of the skin of the foot. Most
athlete's foot is caused by one of two types of fungus.
- Trichophyton
mentagrophytes often causes
toe
web
or
vesicular
(blister-like) infections. The infection
appears suddenly, is severe, and is easily treated. - Trichophyton rubrum often causes
moccasin-type
infections. This condition lasts for a
long time (chronic) and is difficult to treat.
You get athlete’s foot when you come in contact with the fungus and
it begins to grow on your skin. Fungi commonly grow on or in the top layer of
human skin and may or may not cause infections. Fungi grow best in warm, moist
areas, such as the area between the toes.
Athlete's foot is easily spread (contagious)—you can get it by
touching the affected area of a person who has it. More commonly, you pick up
the fungi from damp surfaces, such as the floors in public showers or locker
rooms.
Although athlete's foot is contagious, some people are more likely
to get it (susceptible) than others. Susceptibility may increase
with age. Experts don't know why some people are more likely to get it. After
you have had athlete's foot, you are more likely to get it again.
If you come in contact with the fungi that cause athlete's foot,
you can spread the fungi to others, whether you get the infection or
not.