The 2-hour postprandial blood glucose 8.6mmol/L is high and abnormal for normal people; it is within the target range and normal for diabetics. 1. The normal value of 2-hour postprandial blood glucose for normal people is below 7.8mmol/L. Therefore, a high 2-hour postprandial blood glucose of 8.6mmol/L may be caused by eating too many sweets, or it may be caused by stress, infection and other disease factors, and it is recommended that you consult with a professional physician for a clear diagnosis. 2. For patients who have been diagnosed with diabetes in the past, generally the 2-hour postprandial blood glucose should be controlled below 10mmol/L, so the 2-hour postprandial blood glucose of 8.6mmol/L has reached the control target, and can continue the current treatment program. It is recommended that patients with 2-hour postprandial blood glucose of 8.6mmol/L should go to the hospital in time to improve the relevant examinations and receive standardized treatment under the guidance of the doctor.