When my younger brother developed ringworm, my Dad took a sheet of newspaper and shaped it into a cone. He tucked the end at the open part of the cone under and into the crossing layers, so that end would not unravel and that part was flat. Next he set it on a ceramic plate. He started the tip of the cone on fire and let the tar sweat accumulate on the plate. Then he used his index finger to scope up the tar and rubbed it on the ringworm area. It worked well. Ringworm was completely gone in a few days.
When my younger brother developed ringworm, my Dad took a sheet of newspaper and shaped it into a cone. He tucked the end at the open part of the cone under and into the crossing layers, so that end would not unravel and that part was flat. Next he set it on a ceramic plate. He started the tip of the cone on fire and let the tar sweat accumulate on the plate. Then he used his index finger to scope up the tar and rubbed it on the ringworm area. It worked well. Ringworm was completely gone in a few days.