What is Tinea Cruris (Jock Itch)?

Jock Itch ( Tinea Cruris)

These lectures are not meant to replace your physician and are simply provided as a free educational service to all our visitors. If you feel that you have a skin problem, please see your doctor.

"Jock itch" refers to any itching groin rash of men and is not a medical term. There are many causes for "jock itch". When caused by a fungus, the rash is known as tinea cruris. The fungus causing tinea cruris is a microscopic plant that grows in the outer skin and prefers the moisture. When this fungus infects the feet, it's called "athlete's foot" (tinea pedis).


Fortunately, tinea cruris is not contagious. Direct person-to-person spreading is not a problem. The patient's own case of athlete's foot is the usual source of infection and reinfection to the groin.


Tinea cruris often comes back. Warmth and moisture encourage the fungus to grow. You can prevent recurrences by drying thoroughly after bathing, wearing loose cotton underwear, and dusting a bland powder on your groin once or twice daily. After swimming, put on dry clothes right away; don't stay long in a wet swimsuit.

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