Sometimes you scalp sheds away some white flakes in your hair, or just at the skin level called dandruff. An important cause might be the exposure to hot or cold temperatures. Dandruff affects any common people at any age or ethnicity and sometimes it can be quite unpleasant. Many causes lead to an excessive dandruff fall, while the low problems can be treated with a simple dandruff shampoo. All depends of the type of the skin and hair.