Can I apply sunscreen while swimming?

Doing a good job of sun protection is a basic way to prevent suntan and reduce the harm of ultraviolet rays to the human body. It is generally believed that applying sunscreen 20 minutes before going out is most effective. Summer is a good season for swimming. If you are swimming indoors, you generally don’t need sunscreen, you just need to bring a bath towel. If you are swimming outdoors, just dry your body in time before going ashore and go to a cool place. There is no need for special sunscreen.

1 It is best to apply it about 20 minutes in advance, because sunscreen does not have the sun protection effect as soon as it is applied, it needs time for the skin to absorb it. If it is a purely physical sunscreen product, there is no need to apply it in advance, because it acts directly on the skin surface and will not be absorbed by the skin. The protection provided by sunscreen does not last all day, so you should reapply sunscreen if you are outdoors for a long time.

2. It is troublesome to bring sunscreen when swimming. Moreover, it is harmful to health and environment. You can protect yourself from the sun by bringing a bath towel or a parasol. When you go ashore temporarily, you can wipe off the water on your body with a bath towel, then put on a bath towel or a parasol, which can protect you from the sun well.

3. Choice of sunscreen.

Be sure to choose a sunscreen that is water-resistant. The sunscreen ratio should be at least SPF40, PA+++. Because of the refraction of water, the ultraviolet rays in water are stronger, so the sunscreen ratio must be increased.

4. Reapply sunscreen. The effect of sunscreen can only last for 1-2 hours, but when swimming it is best not to reapply it after 1-2 hours. Instead, when you come out of the water, you should wipe off the water droplets and reapply sunscreen immediately. The effectiveness of waterproof sunscreen will be greatly reduced after being in water for a certain period of time. If you don't apply sunscreen again immediately after getting ashore, the evaporation of water droplets will not only take away moisture, but also cause the sunscreen on your body to lose its effectiveness faster. So it is imperative to do some repairs.

4. Precautions for sun protection when swimming;

1. Use sunscreen 20 to 30 minutes before sun exposure

2. Make sure to use waterproof sunscreen (many are)

3. The multiple must be above 25, 30 is better.

46 Does sunscreen prevent tanning or sunburn?

First, what is the main function of sunscreen? Does it prevent tanning?

Many people wonder, why do I still get darker even though I apply sunscreen every day? Most people have this idea, because they don’t understand the real function of sunscreen and think that sunscreen is just an anti-darkening cream. In fact, this is not the case. Sunscreen cannot make people darker. It can only prevent ultraviolet rays from entering the human body and causing cell damage, thereby preventing ultraviolet sunburn.

Second, what is sunburn?

Ultraviolet rays stimulate skin cells to produce melanin, causing the skin to darken. There are many reasons for skin darkening, including blowing, ultraviolet burns, etc., which can induce sunburn and cause skin darkening. So sunscreen is not an anti-tan cream.

Third, how to repair after sun exposure?

After-sun repair is actually an anti-inflammatory process. After the inflammation is eliminated, the amount of melanin produced by cells will decrease, and the skin color will naturally return to its previous color. The melanin production in the skin actually protects the skin from secondary infection caused by ultraviolet burns.

4. Do all sunscreens sold on the market contain fluorescent agents?

Fluorescent agent is a very scary carcinogen that can accelerate the rate of cancer. Fluorescent agents can be roughly divided into two types, one is migratable and the other is non-migratable. There is no standard in our country that says fluorescent agents cannot be added to skin care products. Never add migrating fluorescent agents to skin care products, because they can migrate into the skin.

5. If the sunscreen says Tan or Tanning, it will protect against sunburn, but not tanning.