just a white discoloration of your skin and not raised? I have the same sort of thing and my doctor told me that it's a fungus, (probably from my night sweats
and it is worse in the summer when it's so hot out). She told me to put on Selsun Blue - it works but ***** because it dries out your skin and it becomes itchy and it also stains your skin a light shade of blue but it has worked for me. I would put it on at night and shower it off in the morning - until it got really dry and itchy - then I would put it on for just half an hour ever night and then wash it off before bed.