Ringworm is caused by the same "virus" that causes athletes feet. What I have done in the past is put tinactin on the site, about 2-3 times a day to clear it up. Make sure you include the "skin" about 1/4 - 1/2 inch outside the circle. Also, now this was on a dog, the vet had a dip that we used. 3X a week. Don't remember what it was. Cindy [Posted in FML issue 3294]