Postprandial blood glucose is generally measured in the clinic as 2 hours postprandial blood glucose. 2 hours postprandial blood glucose 17mmol/L is significantly elevated for both normal people and diabetic patients, and may be more serious. 1. The normal value of 2-hour postprandial blood glucose for normal people is below 7.8mmol/L. Therefore, 2-hour postprandial blood glucose of 17mmol/L is obviously elevated, which may be caused by eating too many sweets, or caused by diabetes, infections and other disease factors, and may be more serious, so it is recommended to consult with a professional physician for a clear diagnosis. 2. For patients who have been diagnosed with diabetes in the past, the general 2-hour postprandial blood glucose needs to be controlled at 10mmol/L or less, so the 2-hour postprandial blood glucose of 17mmol/L is significantly more than the control target, which may lead to acute diabetic complications, such as diabetic ketoacidosis, etc., and should be promptly consulted with a doctor for hypoglycemic treatment. When a patient has a 2-hour postprandial blood glucose of 17 mmol/L, it is recommended that he or she be seen by a physician.