Patients with high blood sugar are at risk for weight loss. Typical symptoms of patients with high blood sugar are excessive eating, drinking, urinating, and weight loss, which can occur if blood sugar continues to be poorly controlled. This condition is caused by a disorder of sugar metabolism in the body. Elevated blood glucose often exists in the body’s relative or absolute lack of insulin, glucose can not be utilized by the tissues and organs, which leads to glucose excretion from the urine, at this time, the body in order to maintain normal function, it will break down its own proteins and fats to provide energy, which leads to weight loss. When blood glucose control is not good and weight loss is obvious, patients should go to the endocrinology department of regular hospitals in time to adjust the glucose-lowering program under the guidance of professional doctors, so that blood glucose can be controlled within the ideal state.