Jock itch is also called ringworm of the crotch (tinea cruris). 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.
Buy Tinactin, Micatin, or Lotrimin powder or spray (nonprescription) at your drugstore. 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.
Jock itch will heal much more quickly if the groin area is kept dry. Your child should wear loosely fitting cotton shorts. Shorts and athletic supporters should be washed frequently. The rash area should be carefully cleansed once a day with plain water and carefully dried. Do not put soap on the rash.
Scratching will delay the cure, so encourage your child not to scratch the area.
Jock itch is not spread to others very easily. The fungus won't grow on dry, normal skin. Your child may continue to take gym and play sports.