For normal people, if the fasting blood glucose 6.2mmol/L is elevated; if the 2-hour postprandial blood glucose 6.2mmol/L is within the normal range, it is not high. Fasting blood glucose of normal people generally fluctuates between 3.9 and 6.1mmol/L. Therefore, fasting blood glucose 6.2mmol/L is slightly higher than the normal range, which may be caused by infections, stress and other factors, or impaired fasting blood glucose. The 2-hour postprandial blood glucose should be less than 7.8mmol/L. Therefore, the 2-hour postprandial blood glucose of 6.2mmol/L is within the normal range, so there is no need to worry too much, and regular monitoring of blood glucose can be done. When abnormal elevation of blood glucose is detected, medical consultation should be conducted in a timely manner.