Four seas net: how can the hot summer be less accompanied by sunscreen. Sunscreen is an indispensable product in summer. So why do sunscreens get darker and darker? You may have entered these misunderstandings.
How did the sunscreen turn black
1. The sun protection index is not enough, or you don't pay attention to make-up. Generally speaking, the effect of sunscreen can last for a period of time, plus the effect of perspiration, at this time you must rub. Generally speaking, 2-3 hours.
2. You don't paint enough. If you apply it a little thicker, the sun protection effect will be better.
3. The sunscreen you use is sunscreen, not sunscreen. That's how many sunscreens in Europe and America work. Because they are white and want to tan a little, but too much sun is not good for the skin, so their sunscreen is generally just sunscreen.
Why is sunscreen darker and darker
Myth 1: as long as you apply sunscreen before you go out, your skin will be free from worry all day long
After several hours of exposure to the sun, the sunscreen effect will be greatly weakened by sweat and sebum, especially for long-term outdoor activities, water activities, etc. after a large amount of oil and sweat, sunscreen should be applied in time. In this hot weather like now, if you have been outdoors, you'd better make up every two hours.
Myth 2: it's OK to wear sunscreen in summer, but not in winter
There is no relationship between sunburn and temperature. The main cause of skin injury is ultraviolet in the light. The ultraviolet is the strongest in June and July. However, the ultraviolet in winter is only 20% weaker than that in summer. Huidong's skin still causes great damage, and 90% of the ultraviolet can penetrate the clouds. Therefore, sun protection should be applied in rainy days all the year round.
Mistake 3: there is no problem with sunscreen staying for a long time
The main function of sunscreen is to absorb ultraviolet rays. Once the time is up, the absorbed ultraviolet rays will stimulate the skin a lot when the sunscreen function disappears. It will not only lose the effect of sunscreen, but also be darker. Therefore, when the sunscreen time is over, you must wash it off. Don't leave the sunscreen on you overnight.
Myth 4: you don't need to apply sunscreen if your skin is white and not dark
The purpose of sun protection is not only to prevent skin from tanning, because ultraviolet radiation will cause skin tanning, light aging, and even skin cancer. If we do not apply sun protection for 30 minutes, it is equivalent to the cancer risk of smoking a cigarette to the skin. Do not rely on their own white willful end!
Myth 5: don't go out without sun protection
Many people don't think it's necessary to apply sunscreen if they don't go out to shine on the sun, but the glass can't block the UV UVA. As long as they have been exposed to the skin through the glass, they will also cause damage. In addition, the UV can be refracted through the air, causing damage to the skin from different angles. It's recommended that you also have a proper amount of sunscreen indoors.
Myth 6: still using last year's sunscreen
Although the shelf life of sunscreen is 3 years or even 5 years, the performance of sunscreen will become more and more unstable after unsealing, and the sunscreen ingredients will be greatly reduced, which can hardly play the original role of sunscreen, or even cause dermatitis.