What is ups and downs weather and what harm does it do to the human body?

According to the authoritative explanation of China Meteorological Network, floating dust weather refers to the weather phenomenon in which sand or soil particles suspended in the atmosphere reduce horizontal visibility to less than 10km. Floating dust occurs when there is no wind or when there is no wind before and after the passage of cold air. It refers to dust and fine sand floating evenly in the air. Most of them are dust and sand from far away spread by the upper airflow, or they are dust storms and blowing sand that have not yet sunk. Fine particles float in the air, causing poor vertical visibility. Particles larger than 10 microns can almost all be captured by the nasal cavity and throat and are difficult to enter the alveoli. But at present, most of the particles in the air are particles below 10 microns that are most harmful to the human body. They can travel straight into the eyes, nose, throat, skin and other organs and tissues, and deposit in the alveoli through the respiratory tract. Once the dust particles in the lungs exceed the clearance capacity of the lungs themselves, they will be deposited in the chest cavity, causing lesions in the lungs and pleura, and causing bronchitis, pneumonia, emphysema and other diseases. In addition, in dusty weather, people's eyes, nose, throat, skin and other direct contact parts will be damaged to a certain extent, which is mainly manifested by irritation symptoms and allergic reactions such as runny nose, tears, cough, and sputum. In severe cases, Cause skin inflammation, conjunctivitis, etc. During sandy and dusty weather, you should try to avoid going out as much as possible, and close doors and windows in time when at home, especially for patients with chronic bronchitis, the elderly and children who have relatively weak resistance. If you don't pay attention to protection during windy and sandy days, old illnesses will relapse or other diseases may occur. If you go out, it is best to use a dust mask and glasses as protection, which can effectively block the irritation of the respiratory tract from wind and sand, and reduce or prevent dust from entering the respiratory tract and lungs. After traveling, people can rinse their mouths with water and clear their nasal cavities to reduce the chance of infection. Because the wind is strong and the climate is drier when sand and dust weather occurs, you should drink more water to speed up the discharge of metabolic waste in the body and enhance your ability to adapt to the environment.