Postprandial blood glucose usually refers to blood glucose 2 hours after a meal, postprandial blood glucose 5.8mmol/L is normal. In the normal population, a postprandial blood glucose value <7.8mmol/L is considered normal. If the 2-hour postprandial blood glucose is ≥11.1mmol/L, diabetes can be diagnosed. A 2-hour postprandial blood glucose of 7.8-11.1 mmol/L is considered to be impaired glucose tolerance, or abnormal glucose tolerance. If a diabetic patient's 2-hour postprandial blood glucose is 5.8mmol/L, for patients who are older, have mobility problems, and are also combined with more serious complications, including cerebral hemorrhage, cerebral thrombosis, myocardial infarction, and diabetic foot and other problems, hypoglycemia is likely to occur with a postprandial blood glucose of 5.8mmol/L. It is recommended to control the 2-hour postprandial blood glucose of this group of patients at 7.5-8.5mmol/L. When abnormal glucose tolerance occurs in the general population, it is necessary to be alert to the occurrence of diabetes, and it is best to go to the hospital to do glucose tolerance test to check whether abnormal glucose metabolism occurs, and when abnormal glucose tolerance occurs, it should be controlled in accordance with the diabetic diet. Especially patients with high-risk factors, including a family history of diabetes, hypertension, coronary heart disease, hyperuricemia, hyperlipidemia, should pay attention to, usually pay attention to monitoring blood glucose.