Most Helpful Girl
Try to use a dandruff shampoo. Dandruff happens when your scalp is too dry or too greasy (your case). The oil causes the dead skin cells (dandruff flakes) to flake up more and clump together which causes the white flakes. Its good to get your hair to oil up but I definitely suggest you try other methods. For instance, olive oil on your hair and put a hair cap over it. Sleep with it in then wash it out in the morning.