Why does the skin turn black in summer?

Question 1: Why does the skin turn black in summer? (1) The most important thing to pay attention to is sunshine. We know that sunlight can darken the skin. The skin will turn black after going out. Whether it is cloudy or rainy, staying outside for a long time (in the open air) will make your skin black, or because there are ultraviolet rays in the sun. On cloudy or rainy days, although the delamination blocks the sunlight, the ultraviolet rays are destroyed by the A-section (long wave) line. Protective measures should be taken when going out, such as wearing a hat, umbrella, sunglasses or applying sunscreen. 10 the morning to 3 pm is the most stressful time of the day. Try to avoid going out in the sun during this time, even if it is cloudy or rainy. When there is sunshine, you can still distinguish the ultraviolet radiation range, which is easy to avoid. You can't see where there is ultraviolet light on cloudy days, which often makes people ignore the effect. Therefore, we should pay attention to avoid purple operation on the skin during the day. (2) Food has a great influence on the skin. Eating more fruits and vegetables, especially foods containing vitamin C, is good for skin whitening, such as tomatoes, strawberries and peaches. If you often eat shellfish and other foods containing a variety of trace elements, your skin will easily turn black. Therefore, the choice of diet should be adjusted as needed. (3) Rest and sleep also have a great influence on skin color. It is a well-known fact that long-term lack of sleep will make eyes black. Poor rest and lack of sleep not only affect health, but also slow down blood flow, shrink blood vessels, turn into spots due to congestion, and turn skin into gray-black. So pay attention to proper rest and adequate sleep. (4) Emotion has a great influence on human body, full of energy, greatly improving human immune function, and has strong resistance to various unfavorable factors. When in a bad mood, the body's immune function is reduced and its ability to resist various unfavorable factors is poor. It is prone to various diseases, and various functions such as skin metabolism and blood circulation are reduced. The skin becomes grayish black, dry and wrinkles increase, showing signs of aging. Therefore, it is extremely important to maintain a happy mood and an optimistic attitude. With a healthy body, you are not afraid of not having good skin; Only a healthy body can have real beauty. Dietotherapy for whitening skin 1. Take three parts of watermelon kernel, one part of orange and one part of osmanthus fragrans, mix, chop and grind, add rice soup, mix well, take a fresh egg, knock a small hole to make the egg white flow into the mixed solution, and take it after heating and cooling, which has whitening effect! ! ! Try it. It's very useful. Beauty is in your hands. Wave the wand in your hand and let it change quietly on your face!

Question 2: Why does the skin turn black? Reason:

Often facing the computer monitor, the radiation of the computer will tan people like sunlight, especially those who sit in front of the computer until midnight at night. Often blown by the wind will also make the skin black, taking drugs containing hormones will also leave spots on the face, and eating too much food will cause pigmentation. It is important to know whether the body is abnormal.

The color of skin is mainly inherited, and it is endocrine that determines whether the skin is smooth or not. Controlling fur is mainly to have enough qi, blood and lung qi. To moisten the skin, eat more foods that moisten the lungs, such as pears, lilies, tremella, honey and so on. There are also people who are often angry or pessimistic. Anger or depression often leads to endocrine disorders, and it is also easy to cause skin yellowing and blackening, so be happy. In fact, if you stay at home every day, it is harmful to your skin, because you can't get sunlight, so the bacteria on your skin can't be eliminated. Over time, bacteria will increase, leading to skin necrosis, unable to metabolize, and will turn black.

Suggestion:

It doesn't mean that it will turn black if you want to bask in the sun. Occasionally basking in the sun is good for your skin. If your skin turns black, it may be that your face is not cleaned well and you eat too much food that is easy to turn black, leading to pigmentation. Always make a hydrating whitening mask, exfoliate occasionally, and eat more foods that help to whiten the skin, so that you will have fair and healthy skin after internal and external conditioning. It is recommended to go out to bask in the sun on sunny days, preferably at 8 ~ 10 in the morning. The sun is the best at this time. It has just risen and is very warm, which will be good for the body and skin. But it is best not to go out in the afternoon, when the sun is the most poisonous. Although it will be good to bask in the sun more, don't stay in the sun for too long, so your skin will turn black and yellow.

Question 3: Why do some people get dark after a little sun exposure in summer? I am one of them who turns black after a little sun exposure, because the growth process of melanocytes and melanin is relatively vigorous and active.

In the depths of human skin, there is a kind of melanocyte that can produce tyrosine, which can be converted into melanin, and the content of melanin determines the depth of skin color. When the skin is exposed to thermal radiation or sunlight, melanocytes located in the basal layer are stimulated and activated. They exist in basal cells at the ratio of 10: 1. These cells are dendritic and shuttle between epidermal cells. Melanocytes contain pigment particles, and melanosome is synthesized in rough endoplasmic reticulum, which will catalyze tyrosine tandem reaction to produce melanin protein. At the same time, tyrosinase will lose its activity and serve as a transporter to transfer it to keratinocytes. The more melanin protein is transferred to keratinocytes, the darker the skin color.

After people with the same skin color are exposed to the sun for the same time, why are some people tanned and some people's skin has not changed much? This is related to many factors. Mainly depends on how much melanin is produced and how much melanin is transferred to keratinocytes, that is, the more melanin is produced and transferred to keratinocytes, the darker the skin color, and vice versa.

Long-term direct contact is easy to cause skin damage and even cancer. There are many sunscreen skin care products on the market now, which can be selected according to SPF value. In addition to wearing sunscreen, the most important thing is to avoid exposure at noon when the sun is strongest, and not to stay under a small shelter for a long time, such as the shade, because at this time, although the human body does not receive direct sunlight, it cannot resist the scattering and reflection of the sun's light because of the small shelter. This is why we feel that we go out all summer and wear umbrellas or other sunshade devices, but our skin is still tanned, and it is easy to get sunburned after a long time.

Question 4: Why does the skin turn black in summer? First of all, we must pay attention to sun protection. Sun protection measures should be taken all year round, and sunscreen should be applied 30 minutes before going out, so that the skin can better absorb sun protection factors and play a role in sun protection. If you stay outside for a long time, you should apply sunscreen every two hours. Besides, you should wear glasses and a hat when you go out. If your skin turns black, I'll teach you how to whiten it. I hope it will help you.

Method 1: Wash your face with rice or milk. There are whitening ingredients in Taomi water. Long-term use can make the skin white. Milk is known to have whitening effect and the effect is good.

Method 2: Eating more foods containing vitamin C can promote skin whitening. This kind of food includes tomatoes, strawberries and kiwis. In addition, the trace elements contained in shellfish also have whitening effect.

Method 3: Pay attention to rest and adequate sleep, because poor rest will not only affect your health, but also slow down your blood flow, remove blood stasis and darken your skin.

Question 5: Why does the skin look black in summer? Whether the skin is black or white depends on whether there are more or less black particles in our skin. Usually we orientals have yellow skin, so the melanin particles are moderate, while Caucasians have almost no melanin, but their skin resistance is poor. Black people are almost all black particles and are not afraid of the sun, so their resistance is better. Why does our skin turn black easily in summer? Because the melanin particles in our body will be more active and vigorous when exposed to ultraviolet rays in summer, there will be more melanin particles in our body in summer, so people will easily turn black. That's why > Because of the strong ultraviolet rays in summer, the sun protection index should be above 20. Choose the kind with fine powder that fits the skin. This will make the sunscreen effect better.

Question 6: Why does the skin turn black when sweating? Not as long as you don't get sunburned. I think it might turn white.

Question 7: Why do people turn black in summer? Melanin is actually a kind of protein, which exists in everyone's body. They exist among cells in the basal layer of skin. At this time, they are not real melanin, but a substance called "melanin protoplasm", also known as "pigment mother cells". Melanin is secreted by pigment mother cells. When ultraviolet rays (B wave and A wave) irradiate the skin (B wave means that UVB acts on the basal layer of the skin, while A wave is more severe and acts on the dermis of the skin), the skin will be in a state of "self-protection". Ultraviolet melanin activates the activity of tyrosinase and protects our skin cells. Tyrosinase reacts with tyrosine in the blood to produce a substance called dopa. Dopa is actually the precursor of melanin, which is oxidized by tyrosine and releases melanin. Melanin moves through the metabolic layer of cells, forming freckles, sunburns, dark spots and other shapes on the skin epidermis. In this way, melanin is a substance produced by the skin to avoid being harmed by ultraviolet rays. From a certain point of view, he is a "good man", but his image is "poor". If the body's ability to synthesize melanin decreases, the skin will become sensitive. The incidence of skin cancer in many European countries is higher than that in African blacks, which is why. So melanin can protect our cells.

A person is darker in summer than in winter because of the strong light in summer, which produces contrast and illusion.

About whitening: Pay attention to sun protection, or change diet can also regulate melanin production.

Question 8: Why has my skin turned black recently? Isn't summer coming soon?

Question 9: Why does the skin turn black? It turns black in summer, and it is not easy to raise it back in winter. If your skin is not very white, it will definitely turn black in summer. Do a good job of sun protection before going out, but usually add more water to your skin. When your skin is hydrated, it will gradually turn white.