Freckle
     Why would appear freckle?Mainly from heredity with the result that.The skin base department melanin the cell number of this kind of household combines not much(even someone think to be opposite to reduce), however its function then is very active.Past secrete more melanins of quantity easily, secondly is because the ultraviolet ray within sunlight project light upon, speeding the melanin cell to secrete function.In recent years, because of the quick development of the industry, and the big explosion of a few sunspots, break atmosphere in of the ozone layer make to project light upon to on the earth of the sunlight ultraviolet ray increase and mightiness, so cause the person who suffer from the freckle increase.
Yellow brown spot
The occurrence is different in the size of the departments, such as face cheek,nose,sum and lips...etc., the appearance is each difference, present tan or the dye spot piece of the coffee color, for a kind of influence beautiful skin disease.Categorize the main factor have:
a. Middle age later:Because of the adrenal glands skin quality function decrease, make its adrenal glands skin quality hormone secrete decrease, but make the brain hang a body to secrete the melanin cell to stimulate the vegetable increment, stimulate the melanin cell but produce a dye spot.
b. The vitamin A,C,E lack.The vitamin A can repress sour enzyme of the cheese ammonia, make it can't the function is sour but becomes dye in the cheese ammonia;The vitamin C can repress sour formation of the cheese ammonia of many Bas oxidize, keeping it from oxidize many Ba's dyes;The vitamin E can promote the AN absorb, also obstructing the formation of the dye indirectly thus.So, the complement vitamin A,C,E to ease the dye spot contain good result.
c. The increment of estrogen inside the body and the pregnant hormone can make the skin dye deepen, the gestation expects these two kinds of hormones inside the body to increase, so will produce the gestation spot(the butterfly spot), general postnatal period most meetings disappear gradually.Because the birth control medicine is the estrogen and the pregnant hormone much is two types of materials, so the oral contraceptive will also make the face produce the dye class, but as long as stop using, generally would also gradual dissipation.
d.With little of the vegetable is relevant.Plain some metalses inside the body can strengthen or activate sour enzyme of the cheese ammonia of activity but cause dye calm and steady, such as iron,silver,arsenic etc..Moreover, the zinc iron lack, then can make the copper increase, but the cheese ammonia the sour enzyme is the copper enzyme , so zinc's lack can produce dye calm and steady.
e. Insolation.The ultraviolet ray in the sunlight can promote the cheese ammonia sour oxidize, the change becomes melanin, so, the insolation is excessive is also an important factor that produces a yellow brown spot.