The most frustrating thing about summer is that even though you have tried so hard to protect yourself from the sun, you still end up getting tanned like chocolate... Blame it on the glaring sun, or maybe you should blame your choice of sun protection time and tools. At the end of the article, there is some very practical sunscreen knowledge Sunscreen knowledge you will definitely use in summer Can I still use the sunscreen I opened last year? Sunscreen that was opened last year can be used as long as it has not expired and its texture or shape has not changed (it is recommended to apply it on a small area on the arm first as a trial). Should I apply sunscreen in advance? Sunscreen starts to work as soon as it is applied, but the effect will become more effective after a period of time. So if conditions permit, you can apply it 10-30 minutes in advance. If you don’t have time, you can apply it immediately. Don’t worry about no effect (it’s just a little bit different). How often should you reapply sunscreen? The time spent in the sun during daily commuting is not long (no more than half an hour), so the sunscreen applied on the skin is not consumed much and does not need to be reapplied throughout the day. However, if you are doing outdoor activities and spend a long time in the sun/sweating a lot/coming into contact with water, the sunscreen will be consumed a lot. At this time, you will need to reapply it, and the frequency of reapplication is generally once every 1-2 hours. |
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