1, the formation of haze conditions: recently the weather in our province is cold, low air pressure, ground wind speed is small, the air flow is slow, conducive to the gathering of water vapor in the lower atmosphere, conducive to the formation of haze. In addition to meteorological conditions, industrial production; motor vehicle emissions; winter heating and coal burning and other particulate matter in the atmosphere, including coarse particulate matter PM10 and fine particulate matter PM2.5 concentration increases. 2, haze harm to the human body? Haze weather is very harmful to human health! The composition of haze is very complex, including hundreds of atmospheric chemical particulate matter. Due to the lowering of air pressure, the harmful respirable particles in the air increase; due to poor air mobility, harmful substances such as viruses and bacteria to the surrounding diffusion rate slows down; due to the hazy weather near-surface ultraviolet light weakened, resulting in increased activity of infectious bacteria in the air, and consequently an increase in the number of respiratory infectious diseases! One of the more harmful is the diameter less than or equal to 2.5 micron fine particulate matter, can be deposited in the upper and lower respiratory tract and alveoli, thus causing cause or aggravate rhinitis, bronchitis, pneumonia and other diseases, especially for patients suffering from lung cancer, interstitial lung disease, bronchial dilatation, chronic obstructive pulmonary disease, chronic bronchitis, chronic pharyngolaryngitis, chronic rhinitis, and other underlying diseases are more harmful. 3, Chinese medicine how to recognize the haze? Fog is an aerosol system consisting of a large number of tiny water droplets or ice crystals suspended in the near-surface air, which is a product of water vapor condensation in the near-surface layer of air. Haze is toxic and harmful fine particulate matter in the floating air. Therefore, Chinese medicine believes that the haze is the evil of dampness and toxicity of disease, dampness, heavy and sticky, lingering and difficult to cure, and easy to injure the body’s yang qi; lungs, the main gas, the Division of respiration, the external nasal orifices, the opening of the orifices in the skin, so the evil of dampness and toxicity is most likely to injure the lungs, as the “Suwen” said: “Autumn injury to the dampness, the top of the reverse and coughing, the development of impotence and syncope,” so the treatment of the haze should be in accordance with the function of lungs, “treatment by the lungs”, “treatment by the lungs”. Therefore, the treatment of haze should also follow the function of the lungs, “treatment with bitter warmth, accompanied by sweet and spicy, to sweat for the reason and stop.”