A citizen of Shenzhen was given sunburn expert on a cloudy day: the disaster caused by ultraviolet rays

Last weekend, while the weather was good, Ms. Zhong and her family went to the outsourced outsourcing. Before going out, Ms. Zhong saw that the sky was more overcast. Without the big sun, she didn't apply sunscreen, nor did she take any protective measures. As a result, when she returned home that night, she felt hot her face and neck, erythema appeared in the skin, and small blisters on the erythema. She felt burning and tingling. She hurried to the hospital for treatment and found that she was related to ultraviolet rays. Experts said that although it is rainy days, the ultraviolet rays are still there. Citizens go out to be alert to the "cloud layer enhancement effect", and sunscreen must be done on a cloudy day.

The weather may also be sunburned

After Ms. Zhong came back, she felt puzzled: Obviously it was a cloudy day, and there was no sun, why would they be sunburned? In response, the reporter interviewed Jiang Shuai, the supervisor of the Shenzhen Centers for Disease Control and Prevention. Dr. Jiang Shuai told reporters that many people think that only hot and spicy sun will sunburn. In fact, it is the ultraviolet (UV) that hurts people in the sun and invisible to the naked eye. Even in cloudy days, the highest -ultraviolet strength can reach about 70%of the sunny days. Ultraviolet rays will also be reflected, so the reflection of seaside or snow mountains, beaches, ice and snow will increase the amount of radiation of ultraviolet rays, and ultraviolet rays are the largest killer of the skin. skin cancer. Therefore, citizens must cover and sunscreen.

In some people's knowledge, the higher the outdoor temperature, the more likely to be sunburned. So, is sunburn and outdoor temperature? Experts from Shenzhen Meteorological Observatory said that there was no direct connection between the two. Even if the weather is not hot, the clouds are low, and the skin will still burn the skin. There is even a more special situation, in the particularly clear weather, the floating clouds cover 50%to 90%of the sky. In this case, a phenomenon often appears called "cloud layer enhancement effect". It refers to the ultraviolet intensity of the cloudy and sunny earth surface, which may be higher than the cloudless sunny day. The maximum can be increased by 25%, and the highest level of the ultraviolet index is 15th level 15.

This also means that in this case, we may need better light protection. In addition, due to the enhancement of the clouds, the highest period of the ultraviolet rays in the day is not necessarily at noon in traditional cognition. Therefore, we must pay attention to sun protection, especially cloudy clouds. Because, compared with the cloudless sunny day, people may suffer greater ultraviolet damage. In addition, it is recommended to reduce going out during the period when the ultraviolet rays are strong, and when the need to go out, they are also undergoing cover and other sunscreen methods.

Experts said that ultraviolet rays can cause a series of skin problems

What skin problems can be caused by ultraviolet rays? The reporter interviewed Guan Yang, deputy chief physician and doctor of medical doctor of the Shenzhen Chronic Disease Prevention and Treatment Center (Shenzhen Institute of Dermatology Prevention and Treatment). He said that there are two main factors that cause skin aging, one is natural aging, and the other is outside the outside world. Discipline (including ultraviolet rays, air pollution, smoking, trauma, etc.), of which the light aging caused by ultraviolet rays accounts for 80%of exogenous aging. Therefore, sun protection is mainly anti -ultraviolet rays.

UVA is divided into UVA with long wavelengths, UVB of the mid -wavelength, and UVC of short wavelengths. Among them, the number one murderer that makes people turning black, long spots, and aging skin is UVA (long waves of ultraviolet rays). Because it can penetrate the dermis layer of the skin, the skin is dark, and it can cause the lipid and collagen to be damaged, cause skin light or even skin cancer; the culprit of the skin is red, sunburn, erythema, pain and other problems. It is UVB (medium wave ultraviolet), which will cause skin sunburn, causing peeling and erythema, but it can be blocked by glass, parasol, clothes, etc. If you do not sunscreen for a long time, you will not only expose black and sunburn, but also aggravate the aging of light. For people with acne, rose acne, freckles, melasma, and sensitive skin, it will also induce or aggravate the condition.

How should citizens do sun protection?

In order to avoid being "damaged" by ultraviolet rays, how can citizens do sun protection? Guan Yang said that the daily sun protection method can be summarized as ABC. A is AVOID, avoid the sun, that is, you can do it without sun. If you want to go out, try to avoid the peak period of the medium wave UVB (10 am -4pm). B is a block, that is, physical obstruction, hats, sunglasses, headscarves and other suggestions. C is Cream, sunscreen. It is generally recommended to choose a materialized sunscreen, which must be used in a sufficient amount at a time, that is, the size of one yuan coin, and apply it every 2 hours.

Specifically, common sunscreens are divided into physical sunscreens and chemical sunscreens. Physical sunscreen is like wearing a layer of mask, so that ultraviolet rays do not directly contact the skin, so as to block the skin and protect the skin and achieve the effect of sun protection. Chemical sunscreen is the purpose of absorbing ultraviolet rays to protect the skin. Both have sunscreen effects.

In addition, after a certain time is absorbed by chemical sunscreen, the skin surface layer will form a protective film that resists ultraviolet rays to achieve the effect of real sunscreen. Therefore, it is best to apply it 10-20 minutes before going out. Physical sunscreen, wiped at any time, can form a film at any time, without having to advance in advance. However, sunscreens are usually sometimes effective, and sunscreens need to be wiped every two hours. In case of accidental sunburn, pay attention to the calmness and soothing, cool the skin as soon as possible, and hydrate and moisturizing are also important, and it is necessary to do a good job of skin barrier repair.

Shenzhen Evening News reporter Lin Ming Zhou Qian, a trainee reporter Lai Chunyan

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