Postprandial blood glucose generally refers to 2 hours postprandial blood glucose, 6.8 mmol/L is normal. In normal people, fasting blood sugar of 3.9-6.1mmol/L and 2 hours after meal blood sugar of 4.4-7.8mmol/L are normal. If a diabetic patient controls postprandial 2-hour blood sugar at 6.8mmol/L, it means that the patient has very good control, especially for type 1 diabetic patients, if they can often keep fasting blood sugar and postprandial blood sugar in the normal range, there will be few acute complications such as diabetic ketoacidosis, various infections, especially lung infections, urinary tract infections and skin infections. If diabetic patients’ blood sugar control is not up to standard, it is conducive to the survival of all kinds of microorganisms, including bacteria, viruses, fungi and mycoplasma, because high blood sugar is a good medium for the survival of all kinds of microorganisms, which can provide energy to all kinds of microorganisms. Therefore, once an infection occurs in diabetic patients, it is much slower to get better than the general population. The general population can recover from an infection, such as a broken skin, in about 7-10 days, but most diabetic patients take 2-3 weeks to recover due to elevated blood glucose, so try to keep the blood glucose control of diabetic patients under the standard state. Diabetic patients’ blood glucose control is generally carried out according to the “five horses” of diabetes. 1. diabetes education: tell patients that diabetes is a lifelong disease and can only be controlled but not cured; 2. exercise therapy: appropriate exercise increases the sensitivity of peripheral tissues to insulin to achieve the effect of lowering blood glucose; 3. diet therapy: follow the principle of 4.Medication: After diet and exercise control, those whose blood sugar does not reach the standard need to intervene with drugs, including oral hypoglycemic drugs, insulin and the application of traditional Chinese medicine; 5.Monitoring blood sugar: Patients should frequently monitor blood sugar to keep their blood sugar in a stable state, with fasting blood sugar generally controlled at 6-7 mmol/L and postprandial 2 hours blood sugar at 6.5-7 mmol/L. Fasting blood sugar is generally controlled at 6-7mmol/L and postprandial 2 hours blood sugar is controlled at 6.5-7.5mmol/L, which is beneficial to patients with diabetes and not prone to acute complications.