A fungus causes the pink, scaly, itchy rash on the inner thighs, groin, and scrotum.
Jock itch is much more common in men than women.
Use antifungal medicine. Twice a day put the powder or spray on the rash and at least 1 inch beyond the borders of the rash. Make sure you get the medicine in all the creases. Continue using the medicine for several weeks, or for at least 7 days after the rash seems to have gone away. Keep the area dry.