Blood sugar 8 ~ 10mmol / L is not necessarily diabetes, if the fasting blood sugar in 8 ~ 10mmol / L and have typical symptoms of diabetes, has reached the diagnostic criteria for diabetes; if the two-hour postprandial blood glucose 8 ~ 10mmol / L at the same time fasting blood glucose is less than 7.0mmol / L, it can be suggested that impaired glucose tolerance, it is recommended that you consult a doctor. The normal standard of fasting blood glucose is 3.9~6.1mmol/L, if the fasting blood glucose is greater than or equal to 7.0mmol/L and there are typical symptoms of diabetes, then it reaches the diagnostic standard of diabetes mellitus; therefore, the fasting blood glucose is 8~10mmol/L, you need to combine with the clinical symptoms to determine whether to diagnose diabetes mellitus. The normal range of two-hour postprandial blood glucose is less than 7.8mmol/L. Two-hour postprandial blood glucose in the range of 7.8~11.1mmol/L and fasting blood glucose less than 7.0mmol/L belong to impaired glucose tolerance. It is important to note that blood glucose testing should be performed after avoiding acute infections, trauma and other factors that affect blood glucose, and that diabetes cannot be diagnosed by a single blood glucose measurement, but rather by a combination of fasting and postprandial two-hour blood glucose, and by the presence of diabetic symptoms such as polydipsia, polyuria and other symptoms of diabetes. It is recommended to go to the hospital and ask the doctor to make a judgment when abnormal blood glucose occurs, and it is not advisable to make a blind diagnosis on your own.