Selecting sunscreen 1. To choose the sunscreen sun protection factor (SPF) according to the intensity of UV rays. In summer, the UV rays are relatively strong, so choose a sunscreen with a higher SPF (recommended SPF>30); in winter, choose a sunscreen with a lower multiplier (recommended SPF10-15). 2, to choose sunscreen according to the number of outdoor activities. If you are an outdoor worker, or a long time for outdoor activities, it is recommended to use sunscreen with a higher multiplier (recommended SPF>30); conversely, you can choose a sunscreen with a lower multiplier (recommended SPF10-15). 3, according to the sensitivity of the skin to choose sunscreen. If the skin is sensitive, you need to choose a physical sunscreen. In addition, children, pregnant women and the elderly are also best to choose physical sunscreen. 4, if you go swimming outdoors, you need to choose a waterproof sunscreen. After each time you go ashore, you need to reapply. Correctly apply sunscreen First of all, you should apply moisturizer before applying sunscreen, do not apply sunscreen directly on your skin because the moisturizing effect of sunscreen does not meet the needs of your skin. Then, take an appropriate amount of sunscreen and apply it to your palm, rub it well and pat it on your whole face, including the area around your eyes and mouth. Do not apply it directly on the facial skin, otherwise it will easily cause clogged pores. Also, sunscreen is relatively greasy and heavy, so it is difficult to spread it evenly with the way you apply it.