The weather is cool day by day, but the discomfort of dry skin and respiratory system reminds everyone that autumn dryness is quietly emerging. How does traditional Chinese medicine view one of the popular health preserving tips, "drinking decoction to get rid of autumn dryness"? Who can drink and how to drink is scientific? What is autumn dryness? Generally speaking, in the late summer and early autumn, people feel cool in the morning and evening, but they obviously feel dry. This is what people often say about autumn dryness. The Yellow Emperor's Internal Canon records that "heat hurts in summer, and dryness will occur in autumn", which is the earliest record of dryness. At the beginning of the Qing Dynasty, some doctors formally proposed the name of "autumn dryness". According to traditional Chinese medicine, dryness is the main qi of the six solar terms in autumn (the beginning of autumn, the treatment of summer heat, white dew, the autumnal equinox, cold dew and frost). Autumn dryness, as its name implies, is a natural phenomenon. There is a very important concept of health preservation and treatment in traditional Chinese medicine, which is called "adjusting measures according to time, place and people". That is to say, appropriate treatment methods should be formulated according to the season, region, human body constitution, sex, age, etc. Traditional Chinese medicine believes that the qi of four seasons corresponds to the viscera of the human body: spring (wind) qi should be in the liver; Summer (fire) should be in the heart; Autumn (dryness) qi should be in the lung; The winter (cold) qi should be in the kidney. The human body conforms to the changes of the seasons, and it is harmonious and unified between man and nature; If the human body can not adapt to the changes of the seasons, it is easy to be injured by evil spirits. As far as the current season is concerned, it is the time to experience long summer (the period from the beginning of autumn to the autumnal equinox). There is a folk proverb "The day of the beginning of autumn brings cool wind". Most people living in areas with four distinct seasons believe that autumn is neither hot nor cold, and it is a very comfortable season, but it is not. Autumn dryness is a season for human health, especially for the elderly, pregnant women, children and other people who are weak, have insufficient resistance, are prone to colds or lack of yin fluid, and sweat too much in summer. If the immunity of the human body is low at this time, it is easy to be injured by the dryness evil and consume body fluid, making the body show a series of dryness phenomena, such as dry nose and throat, sore throat, nosebleed, dry mouth, dry cough with little sputum, cough, dry skin, etc., and people who have a greater reaction will have poor appetite, nausea and vomiting, dry stool and other symptoms. There are "warm" and "cool" dryness. From the perspective of TCM syndrome differentiation, autumn dryness is one of the causes of six exogenous evils (wind, cold, heat, dampness, dryness and fire, also known as "six qi"). Dryness has two properties: one is hot and the other is cold, which can be divided into warm dryness and cool dryness. According to the different manifestations of the two dryness evils, TCM uses different methods to treat them according to their symptoms and signs. First, let's talk about warm dryness, which is caused by the dry air in autumn. It is more hot than hot, and it is usually seen in early autumn. If the warm and dry air hurts the lung, the lung clearing (referring to the role of the lung in removing waste and turbid substances) is not good. Patients often suffer from a series of dryness and heat injury syndromes, such as headache, body heat, dry nose, dry lips, dry throat, dry cough without sputum, thin and sticky sputum, breath inversion, chest tightness and hypochondriac pain, upset and thirsty, dry stool, white thin and dry tongue coating, and red tongue edge. The exogenous warm dryness syndrome can be taken with mulberry apricot soup (frost mulberry leaves, light fermented soybean, bitter almonds, Sichuan fritillaria, gardenia, northern sea cucumber, pear peel), and the doctor can take the decoction after cutting it according to individual conditions; You can also use Qingzao Jiufei Decoction (Frosted mulberry leaves, gypsum, licorice tablets, sesame seeds, donkey hide gelatin, honey