Postprandial blood glucose clinically usually refers to 2 hours postprandial blood glucose. 2 hours postprandial blood glucose of 13.0 mmol/L indicates high blood glucose, which should alert the occurrence of diabetes. Patients are advised to go to the hospital in time and clear the diagnosis through fasting blood sugar, glycated hemoglobin, and glucose tolerance test under the guidance of the doctor. If the patient has 2 hours postprandial blood glucose 13.0mmol/L, symptomatic treatment should be given according to the type of the patient.1. Normal adults: normal range of 2 hours postprandial blood glucose 4.4-7.8mmol/L. If 2 hours postprandial blood glucose 13.0mmol/L, it is suggested that the patient should test fasting blood glucose. If fasting blood glucose is >7.0mmol/L, diabetes can be diagnosed. Patients in this case should exercise appropriately, improve the diet structure, eat less sweets, and take oral hypoglycemic drugs as prescribed by the doctor if necessary; 2. Diabetic patients: 2 hours postprandial blood glucose 13.0mmol/L, suggesting that the patient’s blood glucose control is not up to standard. Diabetic patients should control their blood sugar within 8.5mmol/L at 2 hours after meal. This condition should check the patient’s diet control and the presence of post-meal exercise. If both diet and exercise are well controlled, attention should be paid to the occurrence of infections, such as lung infections, urinary tract infections, and skin infections that can lead to elevated blood glucose. Patients are advised to identify the cause of the infection and take symptomatic treatment such as antiviral and antibacterial drugs. Try to bring the infection under control and bring the blood sugar back to normal; 3. Pregnant women: If the pregnant women have 13.0mmol/L blood sugar 2 hours after meal, it indicates that the patients have higher blood sugar. Because the blood sugar of pregnant women 2 hours after meal needs to be controlled within 8.5mmol/L. If the blood sugar of pregnant women is too high, it will easily lead to fetal malformation. Therefore, in addition to diet control and moderate exercise, such patients need to use insulin to regulate blood sugar.