Although the main ingredients of sunscreen are mostly the same. But the composition and proportion of each component are not necessarily the same. Some sunscreens have their own special functions and add special chemical components.

If the mixture is overlapped on the skin, it may lead to mutual interference or repulsion of components, reduce the sunscreen effect and even cause skin allergies.

Extended data:

Precautions:

1, smear site

When applying sunscreen, don't ignore the neck, chin, ears and other parts to avoid uneven skin color.

2, cleaning supplies

Be sure to thoroughly clean the sunscreen products every night, and don't rest and sleep with sunscreen.

3, the dosage should be enough

Sunscreen is not effective when applied, but only when it reaches a certain amount. Usually, when the amount of sunscreen applied to the skin is 2 mg per square centimeter, the due sunscreen effect can be achieved. It should be noted that SPF values cannot be accumulated. Two layers of SPF 10 sunscreen will only have one layer of SPF 10.

4. Don't mix different brands of sunscreen.

Mixed use will increase the possibility of skin allergy. Different brands of sunscreen have different ingredients. If they are mixed and overlapped on the skin, it may lead to mutual interference or repulsion of components, reduce the sunscreen effect and even cause skin allergies.

5, pay attention to saving

If exposed to high temperature or direct sunlight for a long time, the effect of sunscreen may be reduced. Don't use deteriorated sunscreen cosmetics, because it not only reduces the sunscreen effect, but also irritates the skin more easily.

6, pay attention to the dead corner of the sun

When applying ordinary sunscreen, the skin of eyes and lips also needs attention. But if there is no explanation, or if you use eye sunscreen products, don't use them on the skin around your eyes at will.

References:

Sunscreen-Baidu encyclopedia