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Jock Itch (Tinea Cruris)

By

Denise M. Aaron

, MD, Dartmouth-Hitchcock Medical Center

Last full review/revision Sep 2021| Content last modified Sep 2021
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Jock itch is a dermatophyte (fungal) infection of the groin.

  • Symptoms of tinea cruris include an itchy rash that may be painful.

  • Doctors base the diagnosis on an examination of the groin.

  • Treatment includes antifungal drugs applied directly to the affected areas or sometimes taken by mouth.

This infection is much more common among men because moisture can get trapped between the scrotum and thigh. Tinea cruris develops most frequently in warm weather or when wearing wet and tight clothing. People who are obese are at risk because their skinfolds trap moisture.

The infection begins in the skinfolds of the genital area and can spread to the upper inner thighs and may occur on both sides. Usually the scrotum is not affected or is only slightly affected. The rash has a scaly, pink border. Tinea cruris can be quite itchy and may be painful. This infection often recurs, particularly among people who have onychomycosis Onychomycosis Onychomycosis is a fungal infection of the nails. (See also Overview of Nail Disorders.) About 10% of people have onychomycosis, which most often affects the toenails rather than the fingernails... read more Onychomycosis or athlete's foot Athlete's Foot (Tinea Pedis) Athlete’s foot is a dermatophyte (fungal) infection of the skin of the feet. Symptoms of tinea pedis include a build up of scale on the feet and sometimes redness and itching. Doctors base the... read more Athlete's Foot (Tinea Pedis) (tinea pedis), because fungi can spread from those infections to the groin. Flare-ups occur more often during the summer.

Diagnosis of Jock Itch

  • A doctor's examination of the groin area

  • Examination of a skin scraping

The diagnosis of tinea cruris is usually obvious to doctors based on a physical examination.

Treatment of Jock Itch

  • Antifungal drugs applied to the skin or sometimes taken by mouth

Antifungal drugs taken by mouth (such as itraconazole or terbinafine) may be needed in people who have infections that are widespread or cause inflammation or infections that are difficult to heal.

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Ichthyosis is a form of severe dry skin that causes it to scale (build up excessive dry skin cells) and flake. Ichthyosis ranges in severity from mild to disfiguring, and may be either inherited or acquired. During which of the following time periods does inherited ichthyosis usually first manifest?
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