As an experience, I can mention that to achieve control when there appeared the first patch and that was beginning to spread, what I did was to apply a cotton wet iodine lugol's 5% on the spot for 5 mins is annoying but worth 3 days in a row I applied it the night 5min each, a week after it lifted a scab and there was the evil as a movie and photography, to the two months he wanted to appear once again went back to apply iodine and never went back to know that enfermendad, I hope to be useful to other people only as a recommendation not espner the part that I apply iodine to the sun to avoid discomfort and other reactions.