Diabetes belongs to the category of thirst in Chinese medicine, and the onset of diabetes is considered by Chinese medicine to be related to the excessive consumption of fat and sweet, the tenderness of the internal organs, and the imbalance of the seven emotions. The “Spiritual Pivot? The Five Changes” suggests that “those who are weak in all five organs are good at disease elimination.” That is, the onset of the disease is related to the physical constitution. Su Wen? The “Treatise on the strange diseases” believes that thirst is “the result of fat and beauty” and that the cause of the disease is “the person must have eaten a lot of sweet and fat, fat makes internal heat, and sweet makes the person full in the middle, and the gas overflows and turns into thirst. Su Wen? The general assessment of the theory of deficiency “elimination of disease, fat people are also anointed disease.” It is clearly proposed that the occurrence of thirst is due to excessive consumption of fat and sweet, internal heat is generated, and it is also mentioned that obesity is an important factor in the occurrence of diabetes. In the “Clinical Guide to Medicine”, “Although there is a distinction between upper, middle and lower, there is no more than yin deficiency and yang hyperactivity, but only the drying up of fluid and heat.” The basic pathogenesis of the disease of thirst is clearly defined as Yin deficiency and dryness and heat as the symptoms. Tian Jinying et al. conducted a questionnaire survey on 90 cases of pre-diabetic patients and found that the risk factors for the occurrence of pre-diabetes were Yin deficiency, Phlegm-dampness, Blood stasis, Damp-heat, and Qi deficiency from high to low. Among them, Yin deficiency and Phlegm dampness were the first and second risk factors, accounting for 80% of the incidence, and the incidence of Yin deficiency was significantly higher than that of Phlegm dampness. Ma Jinrong observed 8 cases of diabetic patients and 80 cases of patients with impaired glucose regulation and found that phlegm-damp, yang-vacant and yin-vacant qualities were predominant in both groups, with 22.9% of diabetic patients having yin-vacant qualities and 28.8% of patients with impaired glucose regulation having phlegm-damp qualities. And Sun Lijun et al. studied the distribution pattern of Chinese medicine body type in diabetic patients, through the investigation of 476 cases of diabetic patients, found that the common body type of diabetes to phlegm-damp, Yin deficiency, blood stasis, damp-heat, Qi deficiency five types, of which phlegm-damp, Yin deficiency is the most. And Yan Yong et al. studied 471 cases of type 2 diabetes mellitus population body type, the top 5 are qi deficiency, pinghe, yang deficiency, yin deficiency and phlegm dampness, and phlegm dampness is mostly seen in middle age, and other types increase with age. Wu Xiaoqiu et al. conducted a questionnaire survey on 147 type 2 diabetic patients and found that the main physical types of type 2 diabetic patients were yin deficiency, blood stasis, qi deficiency, phlegm dampness, pinghe, yang deficiency, damp heat, qi yu, and special endowment, and yin deficiency was significantly more than other types of physical types. The highest level of insulin resistance index phlegm-dampness and the lowest level of pancreatic β-cell function yin-deficiency were found in type 2 diabetic patients, and there was a relationship between the body type and insulin resistance index and insulin sensitivity index. These findings validate to a certain extent the theory of etiology and pathogenesis of thirst in TCM and provide support for clinical health guidance.