In the crural and perineal folds, red to brown circinate scaly plaques with or without central clearing may be seen. These are often symmetric at the crural folds. Differential Diagnosis A variety of diagnostic techniques are available with which to identify superficial fungal infection. Scale may be absent in the moist environment. Well-demarcated erythematous plaques with classic silvery scale may be seen at the elbow, umbilicus, gluteal cleft, and the knees.
Topical therapies are usually effective for mild tinea cruris.
Topical agents available include imidazole preparations, allylamines, and adjunctive agents. Topical creams are typically applied twice daily to the affected areas. Systemic therapy is rarely required for tinea cruris. Treatment of dermatophytes should include maintenance of a dry environment, as the infection thrives with moisture. Recurrence is frequent if local skin care is suboptimal.