A 2-hour postprandial blood glucose of 10.4 mmol/L is above the target range for both normal people and people with diabetes, and is not normal. 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 10.4mmol/L may be caused by eating too many sweets, or by diabetes, infections, and other illnesses, and it is recommended that you consult a medical professional for a clear diagnosis. 2. For patients who have been diagnosed with diabetes in the past, generally the 2-hour postprandial blood glucose needs to be controlled below 10mmol/L, so the 2-hour postprandial blood glucose of 10.4mmol/L has not reached the control target, and it is recommended to strengthen the dietary control, cooperate with the appropriate exercise, and consult a professional doctor to adjust the treatment plan if necessary. When the patient has a 2-hour postprandial blood glucose of 10.4mmol/L, it is recommended to consult and treat under the guidance of a doctor.