D.N.
Is this actually ringworm or just assuming because it is round? My daughter has very similar and we are putting hydrocortisone to prevent any itching and Eucerin cream. It is helpiing, though not totally get rid of it. The doc said it is a form of Eczema though, not ringworm. My older children had ringworm when they were little and we only used hydrocortisone on it. they finally stopped getting it. However, one of my girls also had eczema on her legs/thighs but eventually outgrew it.