These fungi thrive in the groin where darkness, warmth and moisture stimulate their growth. Jock itch is more likely to occur in men than women. It is contagious from person to person. Scaling patches on the skin of the groin, thighs and buttocks.
Patches have well-defined edges.
Occasionally small, pus-filled blisters appear. Itching of involved areas. Athlete's foot, a fungus infection of the feet that can spread to the groin area. Contact with infected surfaces, such as towels or benches. Hot, humid weather.