Elevated blood glucose body may have symptoms such as drinking more, urinating more, eating more, weight loss, etc., or there may be no symptoms. 1. Polydipsia: due to elevated blood glucose will appear polyuria, so that the body water reduction, in order to maintain the normal function of the body, the brain thirst center nerve excitation, the patient will appear thirst and drinking symptoms. 2. Polyuria: Elevated blood glucose elevates the sugar in the urine, and once it exceeds the absorption capacity of the renal tubules, it will increase the concentration of solutes in the urine, and the osmotic pressure of the urine will rise, leading to osmotic diuresis and causing polyuria. 3. Polyphagia: elevated blood glucose caused by polyuria, so that a large number of body sugar loss, often in a state of semi-starvation resulting in a lack of energy caused by hyperphagia, while sugar metabolism disorders, there will be symptoms of polyphagia. 4. Weight loss: diabetic patients with impaired glucose metabolism, which can not provide the body with sufficient energy, resulting in weight loss. In addition, elevated blood glucose will also appear other symptoms, such as blurred vision, fatigue, etc. Patients with the above symptoms are recommended to go to the hospital in a timely manner, a clear diagnosis, under the guidance of the doctor for proper treatment.