What is dandruff, and what caused it?

Almost all people in the world has experienced or at least know a person who has dandruff problems, if you don't know any the chances are they hide it pretty well. Dandruff problem is not something to be afraid of or something that can make you want to lock yourself in your room and never meet people, some of the people i know have no problem walking around with those white snowy spots on the back of their black shirt. To know the cure you must first know the problem.

Description on wikipedia about dandruff: Dandruff (also called scurf and historically termed Pityriasis capitis) is due to the excessive shedding of dead skin cells from the scalp. As it is normal for skin cells to die and flake off, a small amount of flaking is normal and in fact quite common. Some people, however, either chronically or as a result of certain triggers, experience an unusually large amount of flaking, which can also be accompanied by redness and irritation. Most cases of dandruff can be easily treated with specialized shampoos.

Major causes of dandruff are impairment of general health, development of a toxic condition mainly due to taking of wrong foods, constipation, and a low vitality due to infectious diseases. Other factors contributing to this disorder are emotional tension, harsh shampoos, exposure to cold, and general exhaustion. As the epidermal layer continually replaces itself, cells are pushed outward where they eventually die and flake off. In most people, these flakes of skin are too small to be visible. However, certain conditions cause cell turnover to be unusually rapid, especially in the scalp. For people with dandruff, skin cells may mature and be shed in 2 - 7 days, as opposed to around a month in people without dandruff. The result is that dead skin cells are shed in large, oily clumps, which appear as white or grayish patches on the scalp skin and clothes.

When the hair is combed or brushed, or when the scalp is scratched, the scales from the scalp fall like snowflakes and settle on the eye brows, shoulders, and clothes. These scales sometimes appear as lumps or crusts on the scalp. Often there is itching as well and the scalp may become red from scratching.