At present, there is no clear reference range for bedtime blood glucose, and bedtime blood glucose can be considered as random blood glucose, and a normal person’s bedtime blood glucose of 6.9mmol/L is generally normal. At present, the indicators commonly used in clinical assessment of blood glucose are fasting blood glucose, 2 hours postprandial blood glucose, glycated hemoglobin, etc. The normal range of fasting blood glucose is 3.9~6.1mmol/L, 2 hours postprandial blood glucose is normally less than 7.8mmol/L. Glycated hemoglobin can reflect the average level of blood glucose in 2~3 months, and the normal range is 4%~6%. If abnormal blood glucose level occurs, it is recommended to go to the endocrinology department of regular hospitals.