Infection starts in inguinal crease and spreads on to thigh. One or both sides involved. Many patients are unaware of infection. Fine scale is present over surface; well-defined scaling border shown.

Fungal infections slowly progress. The advancing border is red with a fringe of scale. To obtain a specimen for potassium hydroxide examination, scrape the border scale with a #15 surgical blade.

Think of Candida infections if patient presents with erythema in the groin extending to scrotum and thigh. Satellite pustules can occur with tinea; more common in acute yeast infection.