The main reason why diabetic patients lose weight fast is because of energy consumption, which is closely related to their own body metabolism, and the reason for the corresponding condition is because of the massive decomposition of fat and protein. Diabetic patients have decreased pancreatic function, insulin secretion, blood glucose utilization capacity decreased significantly, the body’s tissues, cells, energy supply is insufficient, which will further lead to the body fat and protein decomposition, blood glucose control for a long time is poor, there will be a rapid loss of weight, is one of the common symptoms of diabetes mellitus. In addition to losing weight quickly, diabetic patients will also appear to eat more, drink more, urinate more, after the discovery of the relevant symptoms, you need to go to the hospital in a timely manner for further examination, to exclude other causes of weight loss, such as tumors, tuberculosis, etc., in the clinician’s guidance to standardize the treatment, so as to avoid delays in the condition.