Scalp Problems - Dandruff
Very common complaint which is very annoying but very controllable, it is caused by a proliferation of a certain type of yeast on the scalp which irritates the skin which causes it to shed quicker than it should. This causes the white flakes which are so annoying.
Dandruff does not affect the hair growth.
A simple medicated shampoo used daily should work, if it does not you may be suffering from Seborrhoeic dermatitis instead.