I'm really worried becuase I have huge white flakes on my hair, and I don't think it is dandruff, the reason why is because I use Nizoral which prevents dandruff. Could it be the Minoxidil I use?
It will definitely be the minoxidil crystallising or some person playing a joke on you. Either way - apply a thin layer / amount onto the scalp. Gently massage it in and allow to dry. Minoxidil will dry in 5 minutes. Longer - applied too much.