Dark skin sin is always UV
Although human skin is prone to darkening under intense sunlight, the skin becomes darker, and the sins are not necessarily the fault of “ultraviolet rays”!
Ultraviolet rays in the sun can stimulate melanin in the skin, cause skin diseases such as freckles, and affect your appearance. Therefore, medical beauty experts will expose the sun to the enemies of skin fitness, especially women. Beware, even in the cold winter, the “ultraviolet” alsoIt is still strong, so it is best to apply sunscreen when going out.
In addition, because the maintenance time of sunscreen is short, usually 2-3 hours, so remember to use it repeatedly!
In addition to ultraviolet rays, there are actually many reasons for skin darkening: 1. Some people shower too hard. Some people like to rub their skin hard when taking a bath. They want to wash the skin more cleanly. I do n’t know if I use too much force or rub repeatedly.May cause skin darkening, which is called “friction melanosis”.
The mystery of rubbing melanosis has not been fully unveiled, but the relationship with improper rubbing bath has been confirmed by experts. It is mainly due to the local skin being subjected to mechanical stimuli such as strong rubbing pressure, which mostly occurs in bath towels or chemical fiber rubbing.Man in bath towel rubbing hard.
Appears as light brown to dark brown pigmentation, diffuse mesh, high in the clavicle, ribs, scapula, elbows, knees and other bone bulges.
2. Food Some foods are also the bane of skin blackening. Foods with metal elements such as copper, iron, zinc, etc. must have this disadvantage.
This is because these metal elements can directly or indirectly increase the amount and activity of tyrosine, tyrosinase, dopamine and other substances related to melanin production.
These foods mainly include animal liver, animal kidney, oyster, shrimp, crab, beans, walnuts, black sesame, raisins and so on.
3, too much drugs can change the normal skin color, about 10% of patients taking quinine appear blue pigment spots on the face.
Among the sedative drugs, chloropronoxacin poses the greatest threat to race, with butterfly spots appearing on the continuous ingestor’s face, and brownish gray, light blue or purple on the arms.
In addition, repeated use of mercury-containing ointments can also leave brown pigments on the affected area.
There are more drugs that cause plasma changes in anticancer drugs, such as Malilan can turn the crystal into brown red, bleomycin can produce melanin accumulation and so on.