Why does sunscreen produce oil? Is sunscreen still useful if you sweat?

The sun is very strong today and I wanted to apply some sunscreen before going out, but I found that the sunscreen was oily as soon as I poured it out. What's going on? Can I still use the oily sunscreen?

Why does sunscreen produce oil?

The main reason why sunscreen is so oily is due to its chemical ingredients. The texture of the chemical ingredients is relatively thick, and it forms a protective film when applied, so it generally does not feel refreshing. However, sunscreen is still essential in our daily life. It can effectively protect our skin from the damage of ultraviolet rays and delay aging.

Can I still use sunscreen if it produces oil?

It can't be used anymore. The reason why the sunscreen squeezes out oil is of no use after the oil and water are separated:

1. This situation will occur if the device is opened and not used for a long time.

2. Improper emulsifiers are used in the formula;

3. Improper control of speed, time or temperature during product emulsification;

Will sunscreen come off when you sweat?

Sunscreen comes off when you sweat.

Sunscreen stays on the surface of the skin and some of it will be lost with sweating. It should be reapplied every 1-2 hours to ensure the sun protection effect. In addition to the face, sunscreen can also be applied to other exposed parts such as the neck, arms, etc.

Although the sun is strong in the summer, ultraviolet rays are present every day. If possible, you should apply sunscreen all year round, even in rainy weather, especially for people who often work and do activities outdoors. Sunscreen should be applied 20-30 minutes before going out, and it will not last all day long after one application. Reapply frequently.

Is sunscreen still useful if you sweat?

If you use a waterproof sunscreen, it will still be effective after sweating, but the sun protection effect may be affected. If you use a non-waterproof sunscreen, it will gradually be lost with sweat and will no longer have any sun protection effect.