Dr. M.J. Bazos, Patient Handout

About Your Diagnosis
Tinea cruris is a very common superficial fungal infection of the skin in the area of the groin and upper thighs. It occurs most often in men and adolescent boys. Factors that increase risk for infection include tinea pedis (athlete’s foot), obesity, hot humid weather, and use of public baths or showers. Tinea cruris is caused by a very common fungus. The diagnosis is usually made by examination of the skin, but cultures or inspection under a microscope may occasionally be helpful. Tinea cruris can be cured in 2–3 weeks with appropriate treatment.

Living With Your Diagnosis
Involved skin is usually slightly raised, red to brown, and itches. There may be patches, scaling, or small blisters. Both sides of the groin are usually affected. Itching is a common symptom. As long as redness and scaling are present, you are contagious. Scratching can cause oozing, swelling, and secondary infection.

Apply a topical antifungal cream or ointment available without a prescription from any pharmacy, or use the medication prescribed by your doctor. Continue the cream for 7 days after the area has cleared. If you have been prescribed medication to be taken orally, be certain to complete the course of therapy as prescribed.

The DOs
• During and after treatment to help healing and prevent recurrence, always dry the groin first and the feet last after bathing or showering.
• Wear loose-fitting, washed cotton underwear. Change underwear daily or more often to keep the groin dry.

The DON’Ts
• Don’t share towels.
• Don’t touch or scratch feet and then touch the groin area.
• Don’t wear nylon or other synthetic underwear that keep moisture in the groin area.
• Avoid wearing garments that chafe the skin.

When to Call Your Doctor
• If the rash is not improved after 1–2 weeks of treatment.
• If signs of a secondary infection occur, such as fever, pus drainage, oozing, crusting, or swelling.
• If any scarring or bleeding is present.