Video from the American Academy of Dermatology about how to treat dandruff.
Dandruff is a common scalp condition in which small pieces of dry skin flake off of the scalp. The most effective way to treat and control dandruff is to use dandruff shampoo and scalp treatments. If not improving, see your local doctor in case there is a different cause for your scalp problems.
(American Academy of Dermatology, USA, 2015)