ve had this problem since for about seven years now, it first started as just dandruff, but a lot of it, nothing would take it away;
head and shoulders made it worse
and so did selsum blue. Then the flake have gotten as big as the diameter of a 12oz soda bottle cap. Then i noticed that these large flakes looked more like scabs, and as they fell off really big red spots developed with blood under them, it has been on the top half of my scalp the whole five years.