Dead Sea Salt For Skin Problem

The above is how the dead sea salt look like. It is said to be highly effective at relieving Eczema, Psoriasis and other skin ailments. I wonder whether it will work on getting of the ringworm on my daughter's arm. Auntie Lily advised me to get a slice of garlic, rub it with some salt and then rub it on my daughter's skin that is infected with the ringworm. So far I only done it twice. No sign of healing. Maybe I would try with dead sea salt to see whether it works faster.