How much is considered high blood sugar mainly depends on the specific values of blood sugar in different states. In general, blood glucose ≥6.1mmol/L in fasting state, blood glucose ≥7.8mmol/L two hours after meal and random blood glucose ≥11.1mmol/L are all considered high blood glucose. 1. Fasting state: It is usually recommended that the normal range of blood glucose should be 3.9-6.1mmol/L. If the plasma glucose level in fasting state is ≥6.1mmol/L, it is elevated blood glucose. . If it is between 6.1-7.0mmol/L, it does not meet the criteria for diabetes and is called impaired fasting glucose regulation stage, which is the prediabetic state. If the blood sugar in fasting state is ≥7.0mmol/L, the diagnosis standard of diabetes is reached; 2. Two hours after meal: Usually the blood sugar level two hours after meal is the standard for blood sugar in glucose tolerance test. If the two-hour postprandial blood glucose is ≥7.8mmol/L, it can be considered as elevated blood glucose. If it does not exceed 11.1mmol/L, it can be called abnormal glucose tolerance, and this stage is also the prediabetes stage. If the blood glucose ≥ 11.1mmol/L two hours after meal, the diagnosis standard of diabetes is reached; 3. Random blood glucose: there is also a relative diagnosis standard, if the blood glucose ≥ 11.1mmol/L, it means high blood glucose. It should be noted that for those who are pregnant, if fasting blood glucose ≥ 5.1mmol/L and two hours after meal blood glucose ≥ 8.5mmol/L, it can indicate elevated blood glucose. If blood glucose level appears to be elevated, active lifestyle intervention should be carried out, combining diet control and exercise, choosing low-salt, low-fat and light foods as much as possible, eating small and frequent meals, and choosing suitable exercises to control blood glucose level. If the blood glucose level is not satisfactorily controlled after lifestyle intervention, medication should be applied in a timely manner under the guidance of a specialist.