10 Sunscreen Puzzles Must Be Yours.

Because of the popularity of beauty magazines and cosmetics brands, most women already know that sunscreen is very important, but in some sunscreen details, they often feel that their knowledge is ambiguous.

According to intuition to solve the problem is obviously not reliable, take a look at the Department of Dermatology's doctor summed up the 10 big sunscreen details Q & a bar, from a small place to start to avoid skin care mistakes more beautiful.

Q1's myth of high coefficient: the higher SPF, the better?

Sunscreen is the first step in maintenance. Some brands of skin care products even make an issue on the SPF, launching SPF50~SPF60 sunscreen products.

Yang Shuxia warned that the key to sunscreen is not the pursuit of high coefficient, because the shielding rate of SPF15 is 93%, the sheltered rate of SPF30 is as high as 97%, and the sheltered rate of SPF50 is only 1%, which is 98%.

Therefore, as long as we pay attention to sunscreen supplement at any time, we can use SPF15~SPF20 more than enough; conversely, the higher the sunscreen dosage added to the higher coefficient product, the heavier the skin burden is, the more likely it will cause skin partial oil, resulting in acne and sensitive phenomena.

Q2 I'm still young. Do I need to protect myself from sunscreen?

In fact, the damage of sunlight is cumulative.

It means that the sunburn and wrinkles that are produced at the age of 40 are gradually formed from the beginning of continuous exposure.

Moreover, children's skin is delicate, and it is more vulnerable to sunlight.

The most important concept of sunscreen is that the sun protection needs to start from a young age.

The sooner you learn to sunscreen, the better. And it's never too late.

Q3 does your lips need sunscreen?

Protecting your lips from harmful sunlight is as important as using sunscreen to protect your skin, because your lips are more vulnerable to skin damage and aging than your skin.

When choosing sunscreen lipstick, regular brand must be chosen, because the mucosa of lip is rich, the absorptive capacity of harmful substances is strong, and unqualified products will endanger human health.

Other studies have shown that the gloss lip gloss and lip gloss can not protect the lips but attract the sunlight to the lips.

Therefore, dermatologists abroad suggest that before wearing the lip gloss during the day, women should first apply a sun protection lip balm.

It is expected to be more than 20 minutes outside the room. SPF30's sunscreen lipstick should be used. Women should wear the sun protection Lip Balm under lipstick or lip gloss before going out in the morning.

Q4 summer, sunscreen is more important.

Medical research shows that there is an increasing trend of cataracts caused by sunscreen in recent years.

Excessive exposure to the sun in the sun, the crystal protein will absorb ultraviolet light, will become yellow and hard for a long time, resulting in cataracts.

In particular, Blu ray will cause greater damage to the retina. Blue light will cause retinal cells to produce fatty deposits and cause retinal damage.

Therefore, effective eye protection is the only way to avoid sunscreen in summer.

As for how to choose sunglasses, experts suggest that we must choose Sunglasses with UV protection function. The sunglasses without UV treatment are mostly black or dark. When the light is darkened, the pupils will expand naturally and absorb more ultraviolet light, and the ordinary Sunglasses with light colors can not prevent ultraviolet radiation.

Because ultraviolet rays will come in from the upper and lower sides of sunglasses, it is best to choose sunglasses that cover larger surfaces.

Q5 "physical sunscreen" or "chemical sunscreen"?

Chemical sunscreen, also known as "ultraviolet absorber", is an organic compound. It is generally divided into UVA or UVB absorbers, which can absorb light and prevent ultraviolet from being absorbed into the skin.

The advantage is that it is colorless and pparent even if it is applied directly to the skin. It feels more refreshing and the skin has no weight bearing.

The biggest drawback is short sunscreen, suitable for oily and mixed skin.

Physical sunscreens are usually made up of "ultraviolet scattering agents" such as titanium dioxide and Zinc Oxide.

The mechanism of physical sunscreen agents is that when the product is applied to the skin, ultraviolet radiation can cause physical reflection and scattering, so as to avoid direct contact with ultraviolet light.

The physical UV scattering agent will only act on the skin at the top, but not inside the skin.

Its greatest advantages are relatively stable nature, long acting time, high safety and no skin dependence.

What is the correct way to smear Q6 sunscreen products?

You should use it thirty minutes before going out every morning.

No matter whether it is sunny or cloudy, it should be used because dark clouds can not resist ultraviolet radiation.

Both indoor and outdoor, it should be used. Ultraviolet A light can penetrate glass, and fluorescent lamp also contains ultraviolet light.

Add it every two to three hours, because sweat washes away sunscreen, so it should reduce the chance of sweating.

If you need to engage in outdoor sports or swimming with plenty of sweat, you should choose water-resistant sunscreen products.

Don't forget the exposed parts of your arms and neck.

Q7 has sunscreen been invalid for a year?

Sunscreen products for a year two years, three years, sunscreen will not decline.

However, there may be emulsion stratification and oil-water separation.

In fact, emulsification is a physical change.

Simple sunscreen formula (no sunscreen products with too many nutrients), layered but not flavour, shake well before use, or you can use it safely.

No matter what appearance, texture, taste and so on, the sun protection ability will not decrease.

Q8 is it enough to use a sun protection umbrella?

The ultraviolet rays irradiated on us can be divided into ultraviolet radiation directly from the sun and ultraviolet light reflected by water, dust and ground in the atmosphere.

Among them, 60% of the ultraviolet rays are reflected, and only sunscreens or hats are not enough, and sunscreen must be applied.

You should use it thirty minutes before going out every morning.

No matter whether it is sunny or cloudy, it should be used because dark clouds can not resist ultraviolet radiation.

Both indoor and outdoor, it should be used. Ultraviolet A light can penetrate glass, and fluorescent lamp also contains ultraviolet light.

Add it every two to three hours, because sweat washes away sunscreen, so it should reduce the chance of sweating.

If you need to engage in outdoor sports or swimming with plenty of sweat, you should choose water-resistant sunscreen products.

Don't forget the exposed parts of your arms and neck.

Q7 has sunscreen been invalid for a year?