Postprandial blood glucose generally refers to the 2-hour postprandial blood glucose, 4.8mmol / L may be normal or low, need to be based on the specific circumstances of the comprehensive judgment. There are mainly the following situations: 1, the general population: normal people 2 hours after meal blood glucose is 4.4-7.8mmol/L, so the postprandial blood glucose at 4.8mmol/L is normal; 2, hyperinsulinemia: if the patient has hyperinsulinemia, postprandial blood glucose of 4.8mmol/L is a relatively low blood glucose level. Patients are prone to hypoglycemia before eating the next meal, and should pay attention to eating some fruits to avoid hypoglycemia; 3, diabetic patients: postprandial glucose 4.8mmol/L suggests that it is a low level, which may be caused by overdose of hypoglycemic drugs. Especially the elderly diabetic patients, 2 hours after meal blood glucose should be controlled at 7.5-8.5mmol / L. If the age of patients with many complications, postprandial blood glucose will be released more broadly, generally controlled at 7-10mmol / L is regarded as the standard, otherwise patients are prone to hypoglycemia, triggered by other physical discomfort.