There are many daily questions and answers about sun protection.

Several key problems of sun protection

Daily sunscreen question and answer

Do you need sun protection indoors?

If you sit in direct sunlight for a long time, and there are no curtains, coatings and other shielding facilities, it is recommended to apply sunscreen or choose hard sunscreen. If this is not the case, there is no need to take special sun protection measures.

Do you need sun protection under the lamp?

Compared with the direct ultraviolet radiation of sunlight, the basic UVA radiation level of ordinary indoor light sources can be ignored. Even the strong stage lighting is only about 2% of the midday sun in summer, so it doesn't need special protection.

Do you need sun protection against the computer?

The ultraviolet radiation of LCD computer screen is almost zero, so there is no need for sun protection. Facing the computer, the main reasons why the skin is prone to dull and dry may be the acceleration of skin dehydration caused by thermal radiation and the slowdown of blood circulation caused by sedentary.

Do you need sun protection on cloudy and cloudy days?

Need. The radiation intensity of ultraviolet rays on cloudy days can reach 20%-30% of that on sunny days, and it is as high as 50% on cloudy days, which may cause harm to the skin.

Do you need sun protection in autumn and winter?

Need. Although the ultraviolet intensity has slowed down in autumn and winter, we should also pay attention to sun protection.

Why do you get tanned after applying sunscreen?

1. At present, there is no sunscreen that can block 100% ultraviolet rays. As long as the accumulated radiation received by the skin reaches a certain level, the skin will turn black.

2. Insufficient use of sunscreen will also affect the sunscreen effect.

3. If sunscreen has a weak protective effect on UVA, it will also weaken the effect of preventing tanning.

Is the sun protection index as high as possible?

The sun protection index and the concentration of sunscreen are related to the dose. The higher the SPF, the higher the concentration and the more kinds of sunscreen added. Sunscreen can also put a burden on the whole skin. No matter how high the index of sunscreen is, its sunscreen ability is limited.

Does sunscreen need to remove makeup?

Whether it is necessary to remove makeup depends mainly on the waterproof nature of sunscreen. Waterproof ones generally need to remove makeup. You can squeeze a little sunscreen into water and stir it to see if it can dissolve, so as to judge the waterproof property of sunscreen.