When is it appropriate to start using sunscreen What do you think sunscreen is very effective?

Before you protect yourself from the sun, you must understand why and how to protect yourself from the sun. Generally, sunscreen is to avoid damage caused by ultraviolet rays, and ultraviolet rays have three types: long-wave ultraviolet (UVA) wavelength 320 to 400nm, medium-wave ultraviolet (UVB) wavelength 280 to 320nm and short-wave ultraviolet (UVC) wavelength 200 to 280nm. UVA has the strongest penetration, reaching the surface of the ground 100 times that of UVB, which can cause redness and sunburn, and can strengthen the damage of UVB to the dermis, which is the main cause of aging; UVB is the most carcinogenic, and its redness and sunburn effects are 1000 times that of UVA. UVC is blocked by the ozone layer.

IR is infrared, which can cause redness, microvasodilation, inflammation, and promote the carcinogenicity of ultraviolet rays. Therefore, you have to choose sunscreen products that suit you according to your own situation.

And how to choose the right sunscreen? It depends on whether you get in the sun a lot. Do you often work in the sun?

Do you want to swim and splash around? Is there a special use (if after an acid peel or after a laser)? Whether the skin tone is pale and prone to spots...Wait a minute.

In principle: people who work in the sun a lot, people who get in the sun around noon, people who need to be in the sun for a long time, people who need to exercise in the sun (e.g. playing ball, swimming, climbing, skiing...).) or people with fair skin and easy spots, the protection against UVB should be increased; For those who only get out of the sun in the morning and evening, and who are usually in the office, the protection of UVA is actually more important than UVB. In the general case of not being overexposed to the sun in daily life, it is enough to choose SPF 15 and PA ++ sun protection factor products.

I use sunscreen every day of the year, because the sun also has ultraviolet rays in winter, and I don't think anything is better, it's okay.

Sunscreen should be used all year round.

Although the sun is strong in summer, ultraviolet rays are available every day, and if possible, sunscreen should be applied all year round, even in rainy weather, especially for those who often work and do activities outdoors. In addition to applying sunscreen, we should also use parasols, sun-protective clothing, and hats to reduce the damage of ultraviolet rays as much as possible.

It's also crucial to apply sunscreen repeatedly throughout the day. Sunscreen should be applied 20-30 minutes before going out, once and soaking up for a whole day. Sunscreen stays on the surface of **, there will be some loss with sweating, and it should be applied every 1-2 hours to ensure the sunscreen effect.

In addition to the face, sunscreen can also be applied to other exposed areas such as the neck, arms, etc.

In addition, sunscreen should be changed promptly. Most emulsions have an effective shelf life of about 12 months. If sunscreens have been left out for an extended period of time, they will most likely not provide any protection to**.

1. When the temperature is high and the sun is big: no matter what season, if the sun outside is relatively large, it is best to wear sunscreen, especially in summer, it is more recommended to use these, although masks and hats can play some sunscreen effects, but it is always inconvenient, and wearing a mask in summer will feel stuffy, so it is better to wear sunscreen.

2. After basic hydration and moisturizing: sunscreen works best with other skin care products, so we should use sunscreen after using basic hydrating and moisturizing skin care products.

01 Facial cleansing.

No matter what skincare products you use, no matter how expensive they are, if your face is not cleansed properly, it will only have the opposite effect and effect. Or make your skin problems even more endless. Before applying sunscreen or other skin care products, don't be lazy and just wash your face and start smearing it on your face.

After a thorough cleanser, sunscreen should be applied to the closest layer to the skin if skin care or makeup is required.

02 Slap water on your face.

After washing your face, you can pat the water directly, preferably within two minutes after washing your face. I don't know if you have noticed that if you don't pat the water immediately after washing your face, your face will soon become tense and feel very uncomfortable. Therefore, it is necessary to pat the most basic moisturizing lotion as soon as possible, and it is best to use a special cotton pad to allow the water to absorb more evenly.

03 Moisturizing primer.

If you want to be more detailed, you can also apply a moisturizing lotion or moisturizing cream after pat the water, which will retain moisture on the face longer and be less prone to dryness.

04 Apply sunscreen.

After the sunscreen is applied to the **, it takes a while for the skin to form a film, so before going out, it is best to apply it about 30 minutes in advance, so that the effect of the sunscreen can be maximized.

05 Continue to re-rub.

Sunscreen is not applied once, in order to achieve the best sunscreen effect, be sure to reapply every 45 minutes or so, makeup friends, you can choose sunscreen spray to reapply, so that you will not smudge.

06 Apply daily.

Sun protection is a long process, and it can't be ended in a day or two, a year or two years. Basically, from the moment you care about your face, sun protection is the same as eating, it must be done every day until you look old and you no longer care about time leaving traces of time on your face. Regardless of spring, summer, autumn or winter, you must remember to protect yourself from the sun, so as not to be melancholy in middle age.

Remember to clean every day before going to bed**.

Sunscreen is suitable all year round, and no matter what season it is, use sunscreen whenever you go outside. Sunscreen needs to choose products with different SPF or PA values according to the specific object and season to achieve the purpose of sun protection.

Ideally, sunscreen should be used after cleansing and before applying makeup to ensure that it adheres to the cells that need to be protected. But in practice, after basically finishing your daily skincare routine, you can apply sunscreen and then apply your daily makeup. However, sunscreen, like general skin care products, takes a certain amount of time to be absorbed into the skin, so sunscreen should be applied 10 to 20 minutes before going out.

At the same time, it is important to note that the duration of the effect is determined according to the SPF or PA value of the product. Different sunscreen products are suitable for different purposes, and the best thing to do is to try them on the inside of your wrist before you buy them. If there is **redness, swelling, pain, and itchiness within 10 minutes, it means that there is an allergic reaction to the product, and you can try a product that is one times lower than this SPF.

If there is still a reaction, it is better to abandon the brand's sunscreen.

Suitable for times when the ultraviolet rays are relatively strong, sometimes the sun in Yunnan and Sichuan is small, but the altitude is high and the ultraviolet rays are strong, so sunscreen should also be used.

It's time to use it now, just defeated Proya's marine sunscreen, it's very easy to use.

The seasons of the year depend on the length of time you spend outdoors.

Hello, Know Me Cosmeceutical Skin Consultant is happy to help you.

Ultraviolet rays are available all year round, making it suitable for any season, especially for office workers.

Throughout.

As long as there is sun, there is ultraviolet light.

Indoor lights also have ultraviolet light.

It can also be used in autumn when it is dry, and it can also be used in summer.