Diabetes mellitus belongs to the category of “thirst” in Chinese medicine, and has been treated by many doctors for generations with “Yin deficiency and dry heat”. However, why is thirsty disease dry and hot, urine should be less but more frequent? Why do you eat a lot but have a thin body? And at present, the onset of thirst is mostly related to physical obesity, why phlegm and dampness in the body is easy to suffer from Yin deficiency and dry heat disease? These are all related to the disorder of water and fluid metabolism and distribution, the transfer and absorption of dietary essence, and the abnormality of Qi elevation due to the weak spleen and strong stomach. Ling Shu? The spleen is brittle, then it is good at disease elimination. Ling Shu? The “Spleen is a disease of the spleen”. Su Wen? This person must have eaten a lot of sweet and fat, fat makes internal heat, sweet makes the middle full, so its gas overflows and turns into thirst. Fat causes internal heat, which means that the stomach is strong and generates heat; sweet makes the middle full, which means that the spleen is weak and generates dampness, which reflects the basic pathogenesis of diabetes. Su Wen? The spleen is weak and the stomach is strong, which reflects the basic pathogenesis of diabetes. This is the key to understanding the pathogenesis of thirst. The spleen is responsible for raising the qing and the stomach is responsible for harmonizing the descending. Now that the spleen is weak and the stomach is strong, the ascending and descending are out of order, so the spleen cannot transmit fluid upward, but instead water seeps downward, resulting in thirst and frequent urination. This can be seen in the “Treatise on Typhoid Fever” in which the spleen is the “number of urine” and the “thirst” of the “water retention”. According to the degree of spleen weakness and stomach strength, it can be divided into the following stages: (1) spleen deficiency is not very strong, the stomach is strong and generates heat: the patient eats a little more, feels weak, the remaining symptoms are not obvious; (2) spleen qi deficiency, dispersing essence is not enough; spleen qi deficiency, the essence can not be returned to the lungs in time, part of the accumulation and turn into phlegm, resulting in spleen for dampness trapped, at this time the patient may not have three more symptoms, but manifests as spleen trapped dampness obstruction, which is more obvious in patients who are obese, Because of spleen deficiency and loss of transportation, the patient feels weak. (3) Spleen qi loss, loss of essence: the spleen is the main ascending and clearing, regulating, spleen qi does not rise, the middle qi sinks, with the development of the disease, a large number of seepage of essence, spleen qi further deficiency, forming a vicious circle. At this time, the lungs are even more deficient in transmission and distribution, and the organs and tissues are even more deficient in the required essence, so they have to drink and eat more to adjust this imbalance. The spleen is the master of control, not only of blood, but also of fluid and essence, which can be seen clinically as bleeding from spleen deficiency, diarrhea from spleen deficiency, diarrhea with spleen deficiency, urination from spleen deficiency, seminal emission from spleen deficiency, spontaneous sweating from spleen deficiency, edema from spleen deficiency, etc. As a result of the loss of spleen qi control, some of the essence and microscopic substances flow downward, resulting in polyuria, sweet-smelling urine, or grease-like paste. For example, in “The Treatment of Classical Evidence”, it is said, “No water, no odor, but sweetness, this is spleen qi down off.” The kidney is the water organ, which is responsible for the two yin, so the patient drinks one and urinates two, and urinates like paste and fat, and loses weight day by day, blaming the kidney for the deficiency of the door. However, the “Nei Jing” clearly said: “deficient in qi, urine and stool for the change”. Thirsty people urinate like cream, or urine has a sweet taste, sweet is the original taste of the spleen. Therefore, the “Zhang’s Medical General” cloud: “three elimination for a long time and urine does not smell, but made sweet, this spleen qi off, as the most serious disease.” The common complications of diabetes mellitus are caused by the malfunction of the elevation of the spleen and stomach and the pathological phenomenon of spleen deficiency and stomach strength. If the spleen and stomach are not in harmony, the qi and blood have no source of biochemistry, and the qi and blood cannot be carried upward, the eyes are deprived of nourishment, resulting in eye diseases (cataracts, retinal lesions, etc.); phlegm and heat cloud the ears, resulting in tinnitus and deafness; if the spleen is weak, the qi and blood cannot If the spleen is weak, the blood vessels do not function well; if the spleen is weak, water and fluids are not distributed, phlegm and dampness are stored inside the heart vessels, resulting in palpitations and chest pains (coronary heart disease, etc.); if the stomach is strong, heat and toxins attack the lungs and gold is burned; if the spleen is weak, earth does not produce gold, resulting in coughing and coughing with blood and pulmonary consumption (tuberculosis); if the spleen is weak, toxins cannot be carried out; if the stomach is strong, heat and flesh rot, resulting in carbuncles and sores; if the spleen is weak, water and fluid metabolism is impaired, resulting in edema (renal impairment, proteinuria, etc.); if the spleen is sunken, the blood vessels do not function well. If the spleen is deficient, the metabolism of water and fluid is impaired, resulting in edema (renal impairment, proteinuria); if the spleen is sunken, there is no distinction between clarity and turbidity, and if it is mixed, diarrhea will occur.