Tinea Cruris (Jock Itch)
Symptoms
Tinea cruris presents as red, scaly, and well‑defined plaques with raised borders in the groin, inner thighs, and buttocks. Lesions may itch or burn, especially with sweating. Central clearing often leaves hyperpigmented skin. Maceration can occur in severe cases. Concurrent tinea pedis is common.
Cause
Dermatophyte fungi spread from feet to groin via clothing or scratching. Tight, damp underwear and athletic gear create an ideal environment for fungal growth. Overweight individuals with skin folds have higher risk. Sharing towels or athletic equipment promotes transmission. Humid climates exacerbate outbreaks.
Treatment
Topical antifungals applied twice daily for 2‑4 weeks usually resolve infection. Oral antifungals treat widespread or resistant disease. Keeping the groin dry, wearing loose cotton underwear, and changing out of sweaty clothes promptly are preventive steps. Treating coexisting tinea pedis prevents reinfection. Avoiding topical steroids alone is crucial, as they can mask and worsen infection.
Dr. Beth Schulz-Butulis
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