Diabetes mellitus is a disease with the main clinical manifestations of excessive drinking, excessive eating, excessive urination, weakness, emaciation, or sweet-smelling urine. In the world history of medicine, Chinese medicine has the earliest understanding of this disease and discusses it in detail. According to the different pathogenesis and symptoms, there are also records of the names of “Nei Jing” such as “elimination of disease”, “lung elimination”, “diaphragm elimination” and “elimination of disease”. In Han Dynasty, Zhang Zhongjing’s “The Essentials of the Golden Horoscope” has a special section discussing it, and the first treatment prescriptions were proposed, including Baihu plus ginseng soup and kidney qi pill. Sui? The main prescriptions include Bai Hu plus Ren Shen Tang and Ren Qi Wan. The etiology of diabetes mellitus is complicated by congenital deficiencies, dietary disorders, emotional disorders, and excessive exertion. The internal organs of thirst are mainly in the lungs, stomach and kidneys, and its pathogenesis mainly lies in the deficiency of yin and fluid, dryness and heat, with yin deficiency as the main cause and dryness and heat as the standard, which are mutually beneficial. (1) Insufficient endowment: As early as the Spring and Autumn and Warring States Periods, it was recognized that insufficient congenital endowment is an important internal factor causing thirst disease. Among them, especially the Yin deficiency constitution is the most susceptible to suffer. (2) Dietary disorders: Long-term over-eating of fat and sweet, alcohol, wine, spicy and dry, damage the spleen and stomach, resulting in the failure of the spleen and stomach to transport and transform, the accumulation of internal heat, dryness and injury to the fluid, the consumption of grain and liquid, the development of thirst. (3) Emotional and mental disorders: Long-term excessive mental stimulation, such as depression and anger injury to the liver, liver qi stagnation, or exhaustion of the mind, resulting in depression for a long time into fire, fire and internal burnt, burning the lung and stomach yin and thirst. (4) Excessive labor and desire: Inadequate sexual intercourse, excessive labor and desire, loss of kidney essence, internal growth of deficiency fire, resulting in kidney deficiency, lung dryness and stomach heat, resulting in the development of thirst. 2. The pathogenesis of thirst mainly lies in the loss of yin and fluids and dryness and heat, with yin deficiency as the basis and dryness and heat as the standard. The more Yin is deficient, the more heat and dryness prevail, and the more heat and dryness prevail, the more Yin is deficient. The internal organs of the disease are mainly in the lung, spleen (stomach) and kidney, especially the kidney is the key. And affect each other. Therefore, the “three more” symptoms in thirst disorders can often be seen in conjunction with each other. When thirst is prolonged, the following two kinds of pathologies are likely to occur: first, Yin loss and Yang, Yin and Yang deficiency, of which Kidney Yang deficiency and Spleen Yang deficiency are more common. In severe cases, due to the extreme depletion of yin, the deficiency of yang floats over, resulting in irritability, headache, vomiting, rapid breathing, and even coma, syncope, thin pulse, and other dangerous signs of yin exhaustion and yang death. Secondly, the disease is prolonged into the complex, blood stagnation. Blood stasis is one of the important pathological mechanisms of thirst disorders, and the occurrence of various complications of thirst disorders is also closely related to blood stasis. The Chinese medicine on the prevention of diabetes understanding and methods: about the prevention of thirst disease in ancient times that there are Chinese medicine, such as the “source of diseases of the theory of” cloud: “method of cloud: unclothed second Yu calculate figurine stems 18 ridge R Heng thirst, benefit Yin and Yang …… draw kidney, draw water to the throat, moisten the upper part, go to thirst withering disease. The one who benefits yin and yang, raises qi strength also.” Another example is the “preparation of urgent thousand gold to formula”: “formula book medicine is actually more effective, its such as not cautious what? The cautious have three: a drink, two room room, three salty food and noodles. Can be careful of this person, although not taking medicine and can be free of other. Do not know this, even if there is a golden elixir also can not be saved, think deeply and carefully.” The “Confucianism is said from the fire break”: “Do not reduce the taste, do not abstain from appetite, do not moderate the joy and anger, the disease has been made again. Can this three, thirst is also not enough to worry about.” Another example is “Shou Shi Bao Yuan”: “Where the thirst of people. Always prevent canker sores and gangrene.” This shows that the ancestral medicine has long recognized the importance of paying attention to diet, emotions, and the development and implementation of a regular system of life and living, in addition to drug treatment. Of these, diet, in particular, is the most basic treatment. In the case of ensuring the reasonable needs of the body, the intake of grain, fats and oils should be limited, and sugar should be avoided. A diet of moderate amounts of rice, wheat and mixed grains, with vegetables, beans, lean meat, eggs, etc., and regular and quantitative meals are recommended. Some patients in the early stage of diabetes after strict and reasonable diet and exercise, that is, can receive good results.