Do I need to reapply sunscreen when I am indoors? How often should I reapply sunscreen when I am indoors?

As the temperature rises, many girls have begun to incorporate sun protection into their daily skin care routine, and along with it come various confusions about sun protection. So, do you need to reapply sunscreen when you’re indoors?

Do I need to reapply sunscreen indoors?

You also need to reapply sunscreen when you are indoors. Whether you are outdoors or indoors, you need to reapply sunscreen after applying it. Even indoors, there is direct ultraviolet radiation that can damage the skin. After applying sunscreen for a period of time, the sweat and oil secreted by the human body will gradually be oxidized by oxygen. As the effective ingredients of the sunscreen are oxidized, the effectiveness of its use will also be affected. If you do not reapply sunscreen at this time, the subsequent sun protection effect will not be achieved.

How often should you reapply sunscreen indoors?

I don’t often touch up my makeup indoors, and usually reapply sunscreen every 4 to 5 hours. The frequency of reapplication outdoors depends on the degree of sun exposure, usually every 2 to 3 hours. If you work at the beach and work long hours, you will need to apply sunscreen more frequently.

Should I reapply sunscreen directly?

Sunscreen cannot be reapplied directly. Before reapplying sunscreen, you need to wipe off the sweat or oil on the applied area first, and then apply sunscreen again. If you reapply it directly, the sunscreen will slowly be lost from the oil and sweat. Sunscreen is lost through the secretion of sweat and oil, so if you need to reapply sunscreen, you need to wipe off the sweat and oil on your face or other parts before applying the sunscreen. This will help protect against ultraviolet rays and the sun. If you apply it directly, it will cause certain damage to the skin, so sunscreen should not be reapplied directly.

At which step should sunscreen be used?

Sunscreen is the last step in skin care. This sentence must be remembered firmly, so you will know the order of using sunscreen. Because sunscreen needs to form a film, you must leave time for it to form a film before putting on makeup. Don't skip this step because you think it's troublesome, otherwise the sunscreen will be ineffective.