I'm a 16 year old girl with about 20 dime sized white spots on my arm. The spots started with as a scar from ringworm, but have been spreading for the past couple of years. The first spot I found is bigger and lighter than the rest of the spots, so I think that they are getting lighter and bigger the longer they are there. More are popping up, about 5 new ones every year. The newer ones get burnt very easily. I was told to put Selsun Blue on it, because the Selenium Sulfide in it would get rid of it if it is a fungus, but it hasn't worked. What could it be, and what can I do to get rid of them?