By Gary M. White, MD

Tinea cruris A red, scaly rash in the groin.

Tinea cruris represents a fungal infection of the groin, usually by a dermatophyte.


Red, scaly annular lesions in the groin are typical. The condition commonly extends to the buttocks. If a dermatophyte is causative, a red, scaly rash with a raised, "active", border is typical. With Candida, intense erythema with satellite pustules is seen. The patient complains primarily of itch. KOH examination is positive.


A topical antifungal agent (e.g. clotrimazole, miconazole) BID should be given acutely. This condition is usually recurrent as long as the groin stays warm and moist. In order to prevent this, the patient should be encouraged to apply a superabsorbant powder, e.g. Zeasorb AF after the shower. A blow dryer (as used for the hair) may be used after the shower to dry the area prior to applying the powder.

Often, patients with tinea cruris have onychomycosis and/or tinea pedis. If present, these should be treated as well as the fungus easily spreads from the feet to the groin. See onychomycosis.

Additional Pictures

Tinea cruris Tinea cruris

Tinea cruris

Tinea in the diaper area of an infant.
Tinea cruris Tinea cruris

Fungal hyphae on KOH preparation
Fungal hyphae in a KOH


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