no sunscreen is not only shameless, but even deadly!!! You know what? UV damage in summer can not only make the skin produce pigment precipitation, cause the skin to turn black and produce various color spot defects; It will also dry the skin, make the skin dry and rough, damage the elastic fibers in the dermis, and produce fine lines. Strong irradiation will also cause skin inflammation, burns, and even pigmented skin cancer.
[SPF and PA that parents must know]
we often have skin care misunderstandings. For example, we think that the higher the SPF, the better the sunscreen effect, which is certainly not necessarily! SPF and PA of sunscreen represent different meanings. Today, Xiaobian will teach you about SPF.
1. We need to know the common sense of sunscreen value marked on sunscreen:
spf is the value of resistance to UVB. UVB will redden our skin in the short term and cause pigmentation in our skin in the long term, so we can’t ignore UVB.
spf value refers to “a person’s skin will turn red after 20 minutes in the sun without any protective measures”. Therefore, spfl5 sunscreen can prolong the time by 15 times, that is, it will be red after 300 minutes. By analogy, SPF20 will be sunburned after 400 minutes…
pa is the value of UVA resistance. UVA can sunburn our skin, darken our skin in the short term and aging our skin in the long term, so we also need to pay attention to UVA. Also need to know, & gt; 90% of ultraviolet rays are uva22233
. Generally, the intensity of PA is expressed by + and one more + indicates the extension of effective protection time. Specifically, the effective protection time of
pa + is about 4 hours.
pa + + effective protection time is about 8 hours.
pa + + + Super protection.
II. How to choose the sunscreen value in different environments
relatives for indoor work and learning: SPF25 — SPF30, PA + +
exposure opportunities: on the way to work, lunch, indoor sunshine, computer radiation, etc. About SPF30 and PA + + are the most ideal. Apply it every 4-5 hours.
relatives of outdoor work and study: outdoor activities: SPF30 +, PA + + +
exposure opportunities: exposure to the sun for a long time. Choose SPF30 +, PA + + + to feel at ease and apply it every 2-3 hours.
relatives who go to the beach and sweat a lot: Waterproof SPF30 +, PA + + +
finally remind mm that in addition to choosing high coefficient, they also need waterproof and anti sweat effect, which should be rubbed in 2-3 hours.
[correct time to apply sunscreen]
apply sunscreen at least 10 minutes before going out, so as to ensure that the efficacy of sunscreen can be brought into full play and effectively protect our skin
[correct dosage of sunscreen]
don’t be stingy when applying sunscreen products, Each time there must be at least 1-2 ml (the size of a dollar coin drop) in order to achieve the best sunscreen effect.
[how to buy sunscreen products]
the focus of skin care in summer is sunscreen; How to choose sunscreen products?
1, lightness
in hot summer, sunscreen products increasingly advocate lightness. Therefore, if you don’t need to learn to drive, swim and go on an outing for such a long time to be exposed to the sun, the thinner it is. It’s best to let your skin breathe freely without adding burden to your skin.
2. Waterproof and sweat proof
the skin temperature is high in summer and the skin is very easy to sweat. If the sunscreen has no waterproof and sweat proof function, the sunscreen effect will be greatly reduced!
3. Appropriate SPF
select the appropriate SPF, so as to not only give perfect protection to the skin, but also not cause deep burden to the skin due to wrong use! If you use sunscreen products that can only be used outdoors indoors, it is easy to overload the skin and block pores!