The function and efficacy of sunscreen is to protect the skin, which is also the benefit of using sunscreen. Normal use of sunscreen is harmless, but if there are problems such as incorrect use and inappropriate sunscreen, it will bring harm, affect skin health, lead to skin sensitivity, acne, pore blockage and so on.

The functions and effects of sunscreen are as follows:

1, delaying aging. The main reason of skin aging is that ultraviolet rays penetrate the skin, destroy the epidermis of the skin and make the skin lose elasticity. Applying sunscreen can isolate ultraviolet rays and reduce the problem of skin photoaging.

2. Prevent sunburn. Applying sunscreen can prevent and inhibit the production of melanin and prevent the skin from being tanned and turning red.

Use sunscreen need to pay attention to these:

1, the application amount should be appropriate. If you apply it to your face, you can take a coin-sized amount, not too little, otherwise it will not have a sunscreen effect.

2. Pay attention to the application time. Don't apply it when you are ready to go out, but apply it half an hour before going out, which will promote the formation of sunscreen on the skin surface and protect the skin.

3. Remember to make it up. Don't apply sunscreen all at once. With the change of time, the sunscreen effect will gradually decrease. If you are outdoors, apply it again every two or three hours.

4. Apply it every day. Ultraviolet rays exist all year round, whether it is sunny or cloudy.