I suffer from Tinea Versicolor as well. I only get it once every couple of years and mostly from the sun and sweating (i gym it three days a week and sweat easy). I use the generic brand of Selsun blue with a strength of 2.5%. I will tell you this, only use it for about ten to fifteen minutes once or twice a day depending on how bad it is. Do not sleep with it on as it can cause burns to the area being treated. I use it for the suggested time and for 14 days and it clears it right up. This is the first time in two years now that I have had to treat it again. Each person is different but the treatments are effective. Only downside is some who have it, get it back very easily and others (like myself) once treated it typically doesn't return for 2yrs. Good luck, it's annoying but harmless and treatable if you stick to the regimine until the area is cleaned up.