Dandruff occurs with the scalps skin cells slough off at a faster rate and cause itchiness and flaking. The exact cause of dandruff is still unknown, but it is defiantly not caused by poor hygiene. Using shampoos and products designed for the dandruff prone scalp is an effective way of getting it under control. Before shampoo, brush the scalp gently to help loosen any flakes that may appear later. With the right products you can still have healthy, beautiful hair.