To kill the fungus, you must treat ringworm on the scalp with medications taken by mouth. Treatment may take up to 12 weeks. Using an antifungal shampoo may help reduce the risk of spreading the infection to family members and classmates. It's important for anyone who has ringworm to avoid sharing personal items like combs, hats, and towels.
If your child is taking an antifungal medicine, he or she is safe to go to school.