hi i had gone through your query and understand your concerns.
-ringworm is a constitutional diseases-local application of an ointment only suppress the condition and repeat again,so internal medicines are needed for permanent cure.
i would suggest you taking Homeopathic
medicines gives safe and permanent cure for your ringworm complaints
consult your local homeopathic physician for correct diagnosis of the case and remedy to fit your complaints
I hope this is helpful for you, thank you