Go into the wrong zone, be careful, the more sunscreen, the darker

Whitening is a big criterion for beauty, so women generally spare no effort to do sunscreen work, but with so much effort, why is the skin color still not white? At this time, we must carefully consider whether we have stepped into the misunderstanding of whitening, and if it is a detour, it is getting darker and darker.

Misunderstanding 1: no sun protection on cloudy days and indoors

Although it doesn't see the sun on a cloudy day, it doesn't mean there is no ultraviolet light. 90% of the ultraviolet rays can penetrate the clouds and cause damage to the skin. Only the dark and heavy rain clouds can block some of the ultraviolet rays. In addition, UVA containing UVA will refract into the room, which will also cause the skin to darken. Therefore, even if indoors, apply a proper amount of sunscreen, but the amount can be less than the outdoor, and the sun protection factor can be reduced.

Myth 2: The higher the sun protection factor of sunscreen products, the better.

Many people like to buy products with high sun protection factor, think that the higher the coefficient, the better, but it is not. UVA is the primary culprit in aging and blackening the skin. Products marked with "SPF" on sunscreen products cannot be used to deal with UVA, while products marked with "PA+" can be used to deal with UVA. Pay attention when selecting. Moreover, the higher the sun protection factor, the greater the burden on the skin. Therefore, do not blindly choose a product with a high sun protection factor, which should be determined according to the environment and skin characteristics.

Misunderstanding 3: Go out after applying sunscreen products

The active ingredients in the sunscreen products must penetrate into the horny surface layer before they can function. When they are finished, they will go out and the sunscreen material has not been absorbed by the skin. There is no sunscreen effect at all, so it is inevitable to go out to tanning. The correct way is to apply the sunscreen product evenly to the exposed parts of the body 30 minutes before going out, and then add it to the front of the door. In the dosage, it is necessary to apply at least 2 mg of sunscreen per square centimeter of skin. effective.

Myth 4: Long exposure to sunscreen

No matter how good the sunscreen can not be sunscreen for more than ten hours, due to the dilution of sweat and oil secreted by the human body, the sunscreen effect will gradually weaken, so it should be washed and replenished in time. The frequency of recoating depends on the situation and there is no absolute value. If you are outdoors and sweat more, you may need to apply it once in less than 1 hour, but if you are in a cool environment without sun exposure, you can 5 ～6 hours to replenish.

Myth 5: Do not apply sunscreen after tanning

The skin turns brown after tanning, indicating that the skin has entered a self-healing state. At this time, the melanin in the skin can absorb some of the ultraviolet rays B, and the skin is not damaged by the isolation, but the ultraviolet A cannot be absorbed, so the skin will still be darker and darker. When the long-term sun is accumulated, it will cause dark skin, spots on the face, loss of elasticity, wrinkles, and aging. Therefore, even if it is sunburned for a short time, the sunscreen should be painted.