Does the skin change black only blame ultraviolet ray?

Although the person‘s skin passes through intense sun to become black easily, but the skin turns black, the crime is not necessarily all "ultraviolet ray" the blame! 

 

The ultraviolet ray in sunshine can stimulate melanin in the skin, cause the skin lesions, such as freckles affect your appearance, so medical hairdressing experts will be the enemy of the sun is called the skin strong and handsome, emphasize women especially beware, even in the cold winter "uv" is still strong, so the best sunscreen while going out. 

 

In addition, due to the short duration of sun block, it is usually 2-3 hours, so remember to use it again and again! 

 

In addition to uv, there are many reasons why your skin will turn black: 

 

1. Shower too hard 

 

Some people like to rub their skin in the shower, aiming to wash it a little more cleanly, but they don‘t know how to rub it too much or rub it over and over again. It can also cause the skin to become black, which is called "friction and blackening disease". The mystery of the friction melanosis is not fully opened, but with hard rub zao improper relationship has been confirmed by experts, is mainly due to the local skin was oppressed by a strong friction caused by mechanical stimulation, tend to occur in the bath towel or chemical rubbing towel rub. It is characterized by a dark brown to dark brown pigment, and is spread in a network, high in the bone ridge, such as collarbone, rib, shoulder blade, elbow and knee. 

 

2, food 

 

Some foods are also the bane of the skin, and foods rich in metals such as copper, iron and zinc have this drawback. This is because these metal elements can directly or indirectly increase the amount and activity of tyrosine, tyrosinase, and dopamine unitary, which are associated with melanin generation. These foods include animal liver, animal kidney, oyster, shrimp, crab, beans, walnut, black sesame, raisins, etc. 

 

3, drug 

 

Many drugs change normal skin tone, and about 10 percent of patients taking quinine have blue pigment spots on their faces. In the sedative, chloropropyl qin had the greatest threat to skin color, with long time to use the face of the user, the butterfly spot in the neck, and the arm and other places were brown, light blue or light purple. 

 

In addition, the repeated use of mercury ointment can also leave brown pigment in the patient. More drugs that cause skin changes in cancer drugs, such as malian, can turn the skin brown, and bleomycin can produce melanin and so on.