Oops, I forgot your q on nystatin. I have used it successfully on a friend's face rash, which was 50 percent gone the next day after only one treatment. I mixed 1/8 teaspoon with a glob of skin lotion (any kind will work) and smoothed it on. My friend said it stung a little at first but the result was worth it. He never mentioned anything about the rash returning (rosea?) I think, which is a candida symptom. The two symptoms you mention are related.