Because the hair cause of disease of wind of white purplish or white patches on the skin is more complex, include psychological society element, habits and customs. The result of a variety of element action such as area profession, climate and season, make clear because of,its send cause of disease, have important sense to this ill precaution and cure.

One, industrial pollution

The pollution that industrial blowdown causes to the environment is in recent years one of reasons of heighten of incidence of a disease. Industry produces the discharged waste gas without processing, liquid waste, and the material that the tail gas that the motor-driven traffic that increases quickly discharges all contains a lot of deleterious human body, wait for chemistry like 2 oxidation sulfur, strong acid, alkali, lead, arsenic, mercuric, benzene, phenol or heavy metal poison can is opposite directly human body causes harm. In recent years, the fluorine that discovers a large number of discharging kind the ozonosphere in making cryogen destroy aerosphere, the ultraviolet illuminate that causes excess is expressed to the ground face, can cause harm to human body namely. Above the reason that all elements are heighten of dermatosis incidence of a disease.

2, agricultural pollution

The use chemical of crop excessive, if insecticide, antiseptic reachs agent of accelerate the ripening to wait, of carnivorous fowl excessive hello feed grow the inside body remain after hormone butcher, to human body health all can cause undesirable effect.

3, the body development to children and health have snack and beverage snack and beverage to be affected apparently, its reason is: 1) interference children is normal dietary rule, snack beverage is sweet and goluptious, children general its as snacks at any time edible, cannot use normally by time for a long time eat, threw into confusion normal food rule; 2) is long the taste that use an injury: Snack beverage belongs to sweet taste food more, the doctor of traditional Chinese medicine thinks long the tasting that uses Gan Tian can bring about gastric heat to accumulate sluggish, appetite to drop, even anorexia, partial eclipse. Long-term partial eclipse brings about nutriment to absorb inadequacy, because of hidebound and immunize force drops, affect the body namely normal growth, meet those who cause a lot of diseases happen again. 3) some does not accord with the snack of wholesome standard to be able to contain a lot of chemical additive, if the meeting such as agent of coloring agent, antiseptic, sweet taste gives children the body,cause immediate harm.

After investigator discovers a few poison are absorbed, through controlling aspect inside certain enzymatic active and nigrify pigment cell synthesizes an obstacle, cause loss possibly also directly to melanin cell. From at present each country incidence of a disease can see, the pollution of environment and food has bigger concern with this disease, population density is mixed high developing country incidence of a disease is high, indian incidence of a disease occupies world first place, china and Japanese take second place, incidence of a disease of western developed country is inferior. City of our country each heavy industry, oil produces a division, foreland incidence of a disease is apparent on the high side.
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