K.O.
You can treat ring worm with anti fungal cream, like lotrium, if that does not work you can rub on apple cider vinigar (very acid like) but will dry them up fast, just do not do it all the time could leave a blemish on the skin. Some people swear that clear nail polish works, I have not tried this yet. Keep the circles uncovered to get as much air as possible. They are very contagious, wash your hands often and good luck.