Thirstiness and diabetes mellitus have some degree of similarity in symptom expression, but thirst is not exactly the same as diabetes, thirst is the term of Chinese medicine, the basic mechanism for the deficiency of yin and yang, excessive dryness and heat, heat burns the yin, yin fluid depletion, it will show a series of phenomena of yin deficiency, which are as follows: 1, the stomach fire is blazing, which leads to eat a lot of very thin; 2, loss of fluid, which leads to the need for non-stop drinking but Still thirsty; 3, over a long period of time will lead to yin damage and yang, tendons and muscles lose moistening, qi and blood imbalance and headache, chest paralysis, deafness, tinnitus, numbness of the limbs, pain and other symptoms. Diabetes in western medicine has similar symptoms, i.e., three more and one less, which are eating more, drinking more, urinating more and weighing less. However, diabetes is categorized into type I diabetes and type II diabetes in western medicine, and different treatment measures will be taken according to different types.