Tinea cruris, also known as jock itch, or ringworm of the groin, is a dermatophyte of the groin. This rash is more common in men than women. Fungus from other parts of the body, especially tinea pedis or “athlete’s foot” can cause tinea cruris. A warm, dark environment, that is moist can allow the dermatophyte to grow in this area.
Causes
The type of fungus that most commonly causes tinea cruris is caused by Trichophyton rubrum. Other fungi that can cause this infection are Candida albicans (which often causes candidal intertrigo) and Trichophyton mentagrophytes and Epidermophyton floccosun.
Treatment
Tinea cruris of best treated with topical antifungal medications of the azole or allylamine type. These anti-fungals stop the organisms from producing ergosterol which prohibits them from producing a cell wall and survive. In addition, Dr. Michele Green may prescribe a topical corticosteroid cream to relieve the irritation secondary to scratching.
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