Postprandial blood glucose generally refers to the 2-hour postprandial blood glucose, 8.6mmol/L for the undiagnosed diabetic population is considered high, but for diabetic patients is not high, belong to the glycemic control of the standard; if it is the blood glucose value of the other points in time should be determined according to the specific circumstances. A 2-hour postprandial blood glucose of less than 7.8 mmol/L is normal, 7.8 to 11.0 mmol/L is impaired glucose tolerance, and ≥11.1 mmol/L is diagnosed with diabetes when diabetic symptoms are present. Therefore, 8.6mmol/L is on the high side, and it is recommended to improve the fasting blood glucose, glucose tolerance test, glycated hemoglobin and other related tests in a timely manner. For diabetic patients, the goal of glycemic control is generally non-fasting blood glucose does not exceed 10.0mmol/L. Therefore, 8.6mmol/L is not high, and it is a glycemic control standard. It is recommended to go to a professional hospital to determine the cause of the disease, and under the guidance of the doctor for the next step in the examination and treatment.