Tinea Cruris (Jock Itch)

What Is It?

The term "jock itch" typically describes an itchy rash in the groin of a man. Although there are many causes of jock itch, this term has become synonymous with tinea cruris a common fungal infection that affects the groin and inner thighs of men and woman. Athletes often experience jock itch. Tinea is the name of the fungus; cruris comes from the Latin word for leg.

Jock itch can develop when tight garments trap moisture and heat. This creates an environment in which fungi multiply and flourish. Jock itch occurs more commonly in men, but can affect women as well. The jock itch fungus may cause a rash on the upper and inner thighs, the armpits, the area just underneath the breasts, and the feet (athlete's foot). Many people with tinea cruris also have athlete's foot. Athlete's foot is called tinea pedis.

Symptoms

A flat, red, itchy rash first appears high on the inner side of one or both thighs. It spreads outward in a ringlike circular pattern while the center partially clears. The border is sharply demarcated, slightly raised and often beefy red in color. Jock itch can spread to the pubic and genital regions and sometimes to the buttocks.

Diagnosis

Your doctor often can make the diagnosis just by looking at the rash. He or she confirms the diagnosis by scraping a small amount of irritated skin onto a slide. Usually, fungi can be seen under a microscope. Occasionally, your doctor may send the sample to a laboratory to pinpoint the fungus that's causing the trouble. Other causes of a rash in the groin include yeast infection of the skin, seborrheic dermatitis and psoriasis.

Expected Duration

Jock itch can be treated in a matter of weeks, although it commonly recurs. Treatment for chronic infections may last one or two months.

Prevention

Your general state of health helps determine your susceptibility to fungal infections. Remaining healthy through diet, rest and exercise is the first step in avoiding fungal infection.

Here are other steps you can take to remain fungus free:

• Keep your body clean.
• Dry yourself well after showers and baths.
• Shower immediately after athletic activities.
• Wear loose clothing whenever possible.
• Do not share clothing or towels with others; wash towels frequently.