Usually, pre-diabetic symptoms may include excessive drinking, dry mouth, excessive urination and excessive eating, and individual people may have weight loss, etc. Some people may also have no obvious symptoms, but abnormal blood glucose is found during physical examination. For pre-diabetes symptoms, most patients show the typical diabetes symptoms of “three more and one less”, three more refers to more drinking, more urination and more eating, and one less refers to weight loss. The symptoms of “three more and one less” are mostly seen in patients with type 1 diabetes mellitus, while most patients with type 2 diabetes mellitus do not have such typical symptoms. Usually, some of the patients are accompanied by dry mouth and excessive drinking, while some patients have no obvious symptoms, but only elevated blood glucose detected through physical examination. Patients with diabetes are advised to consult an endocrinologist for treatment under the guidance of a doctor.