Abnormal glucose tolerance and diabetes are actually different stages of the same disease. Abnormal glucose tolerance can also be called pre-diabetes. For patients who notice an abnormality in their blood glucose, checking a fasting blood glucose between 6.1 and 7.0 mmol per liter and a two-hour postprandial blood glucose between 7.8 and 11.1 mmol per liter is called abnormal glucose tolerance. A patient with typical symptoms of diabetes and a fasting blood glucose greater than or equal to 7.0 or a two-hour postprandial blood glucose greater than or equal to 11.1 mmol per liter is defined as diabetes mellitus. So both abnormal glucose tolerance and diabetes are actually different stages of diabetes development. If diagnosed with diabetes, the treatment can be firstly through diet control and exercise, and choose hypoglycemic drugs if necessary; during the period of abnormal glucose tolerance, it is preferred to lower glucose through lifestyle intervention. Specific judgment and treatment should be carried out under the guidance of a doctor.