For any unusual rash on your baby, start by talking with his doctor. For ringworm on the body, she'll probably suggest an over-the-counter antifungal cream. You'll need to apply it twice a day, covering an area about an inch beyond the rash.
It usually takes about three to four weeks to get rid of ringworm, and you'll continue to use the cream for a week after the rash is gone. (Some children are sensitive to these creams, so try using just a little bit at first to see how your baby's skin reacts. Consult your doctor for alternatives if your baby develops a different rash in reaction to the cream.) Remember to wash your hands well after you apply the cream.
If your baby has a stubborn case of ringworm, the doctor may prescribe something stronger than the over-the-counter cream. And in some rare cases (rarely), an oral medication is also necessary.
Ringworm of the scalp can be tougher to treat and can take longer to clear up. Your doctor will prescribe an oral antifungal medicine as well as a medicated shampoo. It will probably take at least six to eight weeks to clear up.
Make sure you thoroughly wash your baby's bedding and clothing when you start treatment so that he doesn't get reinfected.