Ringworm: ACV has also worked well for me in combination with MMS foot baths. I had it on my feet. Use 20 drops MMS to 20 drops citric acid, wait until it mixes properly (dark brown) and then add it to a bowl you can soak your foot in, once a day for 10-15 minutes. Try to get the water hot, without burning yourself of course. If you have it on your body you can also take a bath (use 30 drops instead). Or you can apply it as a spray (use 10 drops in 1/2 cup water). For very severe cases where nothing seems to be working MMS might just come in very handy. It's very affordable.
ALWAYS use MMS diluted with water, never by itself.