The 2-hour postprandial blood glucose is 2 hours from the first bite of food. usually, the 2-hour postprandial blood glucose of diabetic patients should be controlled within 10.0mmol/L, and the target range of fasting blood glucose is 4.4-7.0mmol/L. In normal people, the 2-hour postprandial blood glucose is 3.9-7.8mmol/L, and the fasting blood glucose should be 3.9-6.1mmol/L. diabetes is The lack of insulin secretion and/or the impairment of its biological action leads to the disorder of glucose metabolism, accompanied by the metabolic disorders of fat, protein, water and electrolytes, etc. It is mainly characterized by chronic hyperglycemia. For elderly patients or patients with frequent hypoglycemia, the control range can be raised appropriately. However, the long-term control goal of diabetes still depends on glycosylated hemoglobin, which is best controlled within 7%, and ideally within 6.5%. Only single blood glucose fluctuations appear abnormal, but glycated hemoglobin is still normal, you can temporarily not make drug adjustment first. After diagnosed, general diabetic patients can apply medication to control blood sugar under the guidance of doctors to maintain blood sugar within a stable range, which can help control the development of the disease, but need to avoid the occurrence of hypoglycemia. If not controlled in time, blood glucose range has been at a high level, which may lead to complications in some organs for a long time, such as complications in the eyes, nerves, blood vessels and other tissues and organs, and even blindness, gangrene of lower limbs, uremia, cerebrovascular lesions or cardiac lesions in serious cases, which may be life-threatening. In addition, diabetic patients should be regular in their diet, avoid overeating, also eat more vegetables and limit the intake of carbohydrates. They should also insist on exercising, walking, jogging, hiking, swimming, etc., to enhance physical fitness and promote metabolism. Patients also need to learn to self-monitor their blood sugar, observe the changes in blood sugar in time and adjust the treatment according to the doctor’s advice.