Every winter, haze comes by accident. As we all know, haze is the combination of fog and haze. In haze days, the visibility is low, and the breath is not smooth, which is often painful. When the concentration of haze reaches a certain limit, it will cause serious harm to human body and open the door to various diseases. So what are the hazards of haze to human body?
Harm of haze to human body
1, lung injury
Haze days have the greatest impact on the respiratory system, which has become the consensus of most people. The respiratory system has the most frequent contact with the external environment, and the contact area is large. Hundreds of atmospheric particles can directly enter and adhere to the upper and lower respiratory tract and lung lobes of the human body, and most of them will be inhaled by the human body. Secondly, haze weather leads to the weakening of ultraviolet light near the formation, which is easy to enhance the activity of bacteria in the air. Fine particles will 'bring' bacteria and viruses to the depths of the respiratory system, causing infection.
2. Sad dirty
Harvard University School of public health has proved that particulate pollutants in cloudy days can not only cause myocardial infarction, but also myocardial ischemia or damage. In the United States, 25000 people with heart disease or poor heart were investigated. It was found that the mortality of patients increased by 10% ~ 27% after PM2.5 increased by 10 μ g / m3.
3. Injured blood vessel
There are many pollutants in the air and low air pressure in haze days, which is easy to induce the acute attack of cardiovascular disease. In foggy days, the temperature is often low. Some patients with hypertension and coronary heart disease suddenly go from warm indoor to cold outdoor. The blood vessel swells and contracts with heat, which can also increase the blood pressure, leading to stroke and myocardial infarction.
4. Skin injury
The skin also has breathing function. In clean air, the skin will be very comfortable and moist, but if it is in haze, in a very dirty environment, the skin will be very uncomfortable.
5, hurt the brain
Haze not only damages organs, but also affects the nervous system. There is a conclusion at the 65th annual meeting of the American Geriatric Society that if PM2.5 in the air is increased by 10 μ g / m3, the brain function of human will be aged for 3 years.
Five key points to prevent haze in winter
1. Less windows and less doors
Many people are used to opening windows for ventilation, but if it's foggy weather, we should close the doors and windows when we stay at home, and then open the windows for ventilation when the fog disappears. At the same time, we should try our best to avoid going out and exercising outdoors. Especially for the old people and children with weak resistance, we should keep regular living habits and avoid overwork.
2. Wear masks when going out
Wear a mask when going out, which can effectively prevent dust particles from entering the body. Cotton masks are the best because some people are allergic to non-woven fabrics, while cotton masks are generally not allergic and easy to clean. In addition, the mask should be cleaned as soon as possible, and the next day it should be used as standby. Otherwise, the pollutants left on the mask are likely to cause secondary pollution.
3. Do a good job in personal hygiene
Cleaning is very important. Although we put on masks, dust is everywhere in the air, which can't be completely isolated. Face, arms and other body parts are exposed outside for a long time, so it's a good habit to wash your face, rinse your mouth and clean your nose when you go home.
4. Try to avoid outdoor sports
This is especially important for the elderly who love sports, especially morning exercises. If there is a haze, don't try to go out for morning exercises. Haze is very easy to stimulate the respiratory tract, which will cause some serious infections, so it's better to wait for the haze to go away for a few days before resuming the exercise plan.
5. Eat light and drink plenty of water
Try to avoid over stimulation of heavy taste, fried and spicy food, eat more fruits and vegetables, supplement more vitamins, and some foods that can clear the lungs and moisten the throat, which can well alleviate the impact of haze, while drinking more water can solve the problem of dry throat and cough, and reduce the harm of air pollution to the lungs.