Suggest Treatment For Red Itchy Area Behind Right Lower Leg Of Child

My grandson who is 18 months old has a red, itchy area on the back of his right lower leg. I was thought to be exzema, because we have this in our family. After checking skin conditions in kids, I was concerned it might me ringworm. There is definitely a ring appearance to it, with dried dot like areas in a circle. He scratches it, so it is hard to let exactly what the center of it is like. Mom has been putting creams and lotions on it. It disappears and reappears. I know he needs to be seen for this, but if it is ringworm how important is it that he sees someone soon. He has an upcoming 2 yrs check-up his mom was waiting for, is this a wise thing to wait with?? thank you YYYY@YYYY