In summer, the sun is scorching and the ultraviolet rays are strong, what happens if there are too m

In summer, the sun's ultraviolet rays have many benefits to the human body, but its harm should not be underestimated, if people stay outdoors for a long time without UV protection, the human body will be damaged by ultraviolet rays. Let me analyze the dangers of too much ultraviolet light.

Long-term exposure to ultraviolet rays can easily cause dullness, and wrinkles and spots will begin to grow on the face, accelerating the aging rate, reducing immunity, inducing genetic mutations, and even bringing deep damage to genetic factors.

According to the doctor's statement, ultraviolet rays with wavelengths smaller than 220nm are almost absorbed by the keratinizing layer, and ultraviolet rays with a wavelength of 290nm will act directly on them, causing erythema reaction. Diffuse erythema, localized itching and burning, and small blisters or edema may form when exposed to intense ultraviolet light. Some patients may also have systemic symptoms, such as physical discomfort and fatigue, and even induce **cancer.

Strong ultraviolet rays will cause corneal damage under long-term irradiation, if short-term irradiation, corneal damage will be relatively shallow, mainly damage the epithelium, generally 24-48 hours can repair itself. If you can't open your eyes and keep crying, you need to go to a regular hospital for **.

Ultraviolet rays act directly on the nervous system, causing symptoms such as increased body temperature and headaches and dizziness. In addition, long-term exposure to short-wave ultraviolet rays can also cause neuropathic toothache.

Therefore, for ultraviolet protection, the protection that should be done should still be done, you must do a good job of sun protection when you go out, bring a good sun hat and sunglasses, apply sunscreen, if you work outdoors for a long time, sunscreen should be reapplied every two hours. Doing a good job of sun protection in summer can prevent irreversible damage to the **, nervous system and eyes.

Too much ultraviolet radiation may cause **damage, cause blood abnormalities, and may become cancerous.

If there is too much ultraviolet rays, people's ** will become dark, the body's immunity will decrease, and it is easy to be eroded by germs.

If you have too much ultraviolet rays, you will get sunburned, red, swollen, and itchy, and in serious cases, it will cause some diseases.

In summer, due to the direct sunlight in the northern hemisphere, the ultraviolet rays are strong, and the human body's ** secretes a large amount of melanin in order to resist ultraviolet rays, so it will become dark, and in winter, the sun directly hits the southern hemisphere, so the ultraviolet rays are not strong, so they will not turn black.

As we all know, it is easy to turn dark in summer, which is also a worry for many beauty-loving women. So how do you avoid getting dark in the summer?

If you want to have and maintain fair skin, you need to take precautions during the darkening season, especially in the summer. How to avoid getting dark in summer, we need to do the following:

1. In summer, the hottest and strongest ultraviolet rays in the day is from 10 a.m. to 2 p.m., so we should try to avoid going out during this time period to avoid harming the skin.

2. When you have to go out, you must take sunscreen measures and wear sun hats, sunglasses, etc. as much as possible.

3. It is best to use some sunscreen when going out in sunny weather, even if you are swimming, and the sunscreen used for swimming should have a higher sun protection index.

4. No matter what the degree of sunlight is in the weather that day, as long as you have been out of envy activities, you need to go home to take a shower, and it is best to apply some skin care lotion.

The above methods can solve the problem of how to avoid darkening in summer, and I hope that beauty lovers will pay attention to the ruler and do a good job of protection in summer.

Tanning is caused by ultraviolet rays. Because the human body is exposed to ultraviolet rays, it produces more melanin. In the deep layer of human beings, there is a kind of melanocyte, which can produce tyrosine, which can be converted into melanin, and the amount of melanin content determines the depth of color.

Of course, it will be harmful to the human body, and for some people who are more allergic, it will cause **flushing, and it will lead to damage to **cells.

There will be harm. Long-term exposure to ultraviolet rays will not only tan, which is not good, but also various spots and other problems.

Long-term exposure to ultraviolet radiation is not good for the body. UVA ultraviolet rays are more penetrating, it can penetrate deep into the dermis to produce free radicals, long-term exposure to UVA exposure will lead to premature aging and immunity problems.

It's okay, human beings have been basking in the sun for thousands of years, and there is no need to be afraid of ultraviolet rays, not to mention the outdoor activities of modern people who are far less than the dust of the sedan chair before, so there is no need to worry about the sail front.

Because the ultraviolet rays may be strong during the day, there is no good defense against the exposed **, and after being exposed to direct sunlight**, it will increase melanin. And with the passage of time, the enhancement of ultraviolet rays, the more melanin increases, it may return to a large amount of melanin on the surface in a short period of time, so it will become black in a short time!

But it's only a temporary phenomenon, it doesn't work so quickly, it will recover in a few days, but it's not as white as before. Unless you're exposed to strong sunlight for a long time**, it will really get dark, don't worry.

Usually eat more fruits and vegetables, insist on drinking milk, and pay attention to sun protection when going out.

However, I personally think that it is quite good to spend more time in the sun, and it is also a kind of beauty to have a healthy color.

Both men and women. It is easy to tan, which is related to the individual's skin type, that is, as the saying goes, some people have sunburned, some people have not sunburned, and people who are relatively not white have more melanin than white people, so it is easier to tan. But you can do it with milk and give it a try.

Although it can't be as white as a person who is white, it can make ** look clear.

After cleansing your face at night, apply milk to your face and rinse it off with warm water after 10 minutes.

It's best to apply the most restorative night cream in the evening, so that you can repair your ** overnight.

Drink more green tea, green tea can clear away heat and relieve heat, prevent radiation, and anti-aging.

Eat more fruits, especially those that contain vitamin C, such as tomatoes.

You can also drink water with lemon slices and honey, which can not only whiten **, but also achieve ** effect.

During the day, be sure to wear sunscreen, and even if it is not summer, you must wear sunscreen or barrier cream in other seasons, so that you can make a little whitening.

It is impossible for people to become white immediately, but they can be raised white little by little through the bits and pieces of life, I am like this, although I can't compare with **white people, but compared with myself, it is much whiter than before, you can give it a try, but don't be too anxious.

If you persevere, I believe you will change.

Matter. The strength of ultraviolet rays is mainly related to the thickness of the ozone layer. UV radiation levels are affected by a number of factors such as solar altitude, latitude, cloud cover, altitude, ozone, ground vegetation conditions, etc.

As sunlight passes through the atmosphere, almost all UVC and about 90% of UVB are absorbed by ozone, water vapor, oxygen and carbon dioxide.

I can't say that it doesn't matter, but I can't say that ultraviolet rays are not strong when the weather is not hot. Sometimes it's cloudy, and that's also very UV. However, if it is a sunny day, especially in the afternoon, the ultraviolet rays must be relatively strong at that time.

However, in addition to the weather, there will be ultraviolet rays, such as fluorescent lamps, etc., so do not shine directly at the fluorescent lamps.

There is no necessary connection, strong ultraviolet rays mean that the light is strong, but the weather is not necessarily hot.

If there is a large amount of dust or water droplets in the air, the ultraviolet rays will be attenuated a lot, so the ultraviolet rays are relatively strong when the weather is clear.

The weather is hot because the infrared radiation is very strong, the infrared wavelength is long, and the ability to bypass obstacles is strong, even on a cloudy day, it can be very hot when the sun is not visible, especially in summer, so there are often muggy times.

Ultraviolet light is a general term for all wavelengths of light from visible light to X-rays. The ultraviolet class is divided into: short-wave ultraviolet light.

Carcinogenic, but mostly absorbed by ozone; UVB light. It can mostly penetrate ozone, but it can only reach the epidermis of the human body, which will cause people to have symptoms of photodamage in the short term and cause cancer in the long term; Long-wave ultraviolet rays. It can enter the dermis, which is the culprit that makes us black, and long-term exposure to this band can also cause cancer.

So to sum up, long-term exposure to ultraviolet rays is very dangerous. The main threat comes from UVB.