★★★★★
Dab Mercurochrome onto Ring worm with cotton tip, do this daily for two weeks, careful of staining fabrics. If this fails, use laundry 'Blue Bags', wet bag or block and rub on affected area forming a little paste, leave to dry, will wash off when bathing next, reapply.
EC: Mercurochrome is no longer sold in the USA as of 1998. Great article: http://www.straightdope.com/columns/read/2518/what-happened-to-mercurochrome