What are the reasons for the summer skin black?

One to the summer, many girls began to hate the sun, the fear will be tanning. But the skin is not necessarily a black UV, the skin becomes dark and other reasons.

1. UV

Sunlight in the ultraviolet light can stimulate the melanin in the skin, induced freckles and other skin lesions, affecting your appearance, so medical beauty experts will sun known as an enemy of the skin fit, emphasizing in particular, women should be careful, even in the cold winter "ultraviolet" also remains strong, so when they go out best to smear sunscreen. In addition, because the maintenance time is relatively short, usually 2-3 hours, so remember to be used repeatedly!

2.Take a bath too hard

Some people take a bath like force rub the skin with the intention of some washed cleaner, not knowing the force is too large or repeated rubbing can cause skin darkening, refers to the "friction melanosis". The mystery of friction melanosis not yet been fully opened, but with force Cuozao improper relationship have been experts bag manufacturer confirmed, mainly is due to local skin by strong friction and pressure and other mechanical stimulation induced, occurred in the bath with bath towel or chemical fibber class Cuozao towel force of friction. Is light brown to dark brown pigment calm, a diffuse network, high in the clavicle, ribs, shoulders, elbows, knees and other bone uplift.

3.Food

Certain foods are also the bane of the black skin, rich in copper, iron, zinc and other metal elements in food have such drawbacks. This is because these metals can directly or indirectly increase the number and activity of substances such as tyrosine, tyrosinase, and dopamine, which are related to the formation of melanin. These foods are mainly animal liver, kidney, oysters, shrimp, crab, beans, walnuts, black sesame, raisins, etc..

4.Drug

Many drugs can alter the normal color, taking about 10% of patients who face blue pigment. In the sedatives, the chlorine third Qin on the skin of the biggest threat, the long time taking hudie ban appears in the face, neck, arms, etc. is gray brown, light blue or light purple. In addition, the repeated use of mercury containing ointment, also can leave brown pigment in the patient. Anticancer drugs has caused the color changes in drug more such as Maryland can become a reddish brown color, bleomycin can bag factory produce melanin accumulation, and so on.