Overall, diabetes is a chronic disease, but when the disease develops to the end stage or serious complications occur, it indicates that the diabetes is very serious, and the mortality rate of such patients is higher. This is because severe diabetes is poorly controlled and is often associated with a variety of complications, both acute and chronic, with acute complications posing a significant threat to the patient’s life. If the patient has diabetic ketoacidosis or hyperosmolar coma, it can easily lead to acute cerebral edema, acute cardiovascular and cerebrovascular events, which can lead to death. And if there are very serious chronic complications, such as coronary artery disease, cerebral infarction, diabetic foot, etc., in this case the patient’s risk of death is quite high. Especially in the case of diabetic foot, the condition develops to an advanced stage with obvious gangrenous necrosis, in which case the patient’s mortality rate will be relatively high. Therefore, for diabetic patients, controlling the disease is very crucial in order to delay life as well as to improve the quality of life.