How often should sunscreen be applied? Sunscreen is effective only when applied regularly.

Some people say that sunscreen must be applied every few hours, otherwise it will not be effective. But some people say that most sunscreens can last for 6-8 hours now, so it’s okay not to apply it. But how often should we reapply sunscreen? If you want to know, come and have a look.

How often should you reapply sunscreen?

How often you apply sunscreen depends on the environment you are in. If you are an office worker working indoors, you can usually just reapply it around noon. If you are doing outdoor activities, you need to reapply every 2-3 hours, because sunscreen will be oxidized by ultraviolet rays and gradually lose its sun protection effect. For those who swim in the swimming pool or need to do activities at the beach, they usually need to reapply it every time they come out of the swimming pool or the sea. Although most sunscreens are now waterproof, they will still be washed off after coming out of the water, reducing their effectiveness.

Sunscreen needs to be applied in advance

To achieve the ideal sun protection effect, we must apply sunscreen 15-20 minutes before going out. Because sunscreen does not immediately provide sun protection once applied. Sunscreen also needs a certain amount of time to be absorbed. Only after the skin absorbs it will a protective film against ultraviolet rays be formed on the skin surface, allowing the skin to achieve a real sun protection effect.

The amount of sunscreen varies from person to person

When using sunscreen, we must choose according to our personal situation. Generally speaking, ordinary office workers will not be exposed to strong sunlight and ultraviolet rays, so they can just choose ordinary isolation cream. The multiple of isolation cream is generally SPF15-20. If it is autumn, winter or spring, and we need to stay outdoors for a long time, we can choose a sun protection value of SPF25~30. If you are going to be outdoors for a long time in the summer when the ultraviolet rays are strong, you should choose a sunscreen with an SPF of 50.

Moisturize before using sunscreen

Most sunscreens contain a large amount of ingredients, so before applying sunscreen, we can apply a layer of lotion or cream first, and try not to let the sunscreen come into direct contact with the skin. Because this can not only add some moisture to the skin, but also reduce the irritation of sunscreen to the skin.