How to treat ringworm hair loss. The first thing to do is to take the local treatment, and then the whole body treatment. 1, local treatment: to remove the hair to clean, that is, to cut the hair short or even cut light. Use 5% sulfuric acid ointment to apply externally to the whole scalp, the requirement is 1-2 times a day for 5-7 weeks. A 2% or 5% tincture of iodine can also be applied externally to the entire scalp 1-2 times a day, also for 5-7 weeks. For bacterial infection, or vesicles are more obvious, you can use 1:8000 potassium permanganate solution to wash, coated with gentamycin ointment, also 2 times / day. 2, systemic treatment: especially for children can choose ashwagandha tablets. Then you can take itraconazole capsules orally, including ketoconazole, but ketoconazole is more damaging to liver function, so it is not used much now. Then it is necessary to pay attention to personal and public hygiene, to find the source of infection, in order to prevent the onset of tinea capitis.