Generally, the blood glucose monitored at around 22:00 pm is called bedtime blood glucose, and bedtime blood glucose of 6.0mmol/L is normal. Normal fasting blood glucose value range in 3.9-6.1mmol / L, normal people two hours after the meal blood glucose <7.8mmol / L. If the bedtime blood glucose is 6.0mmol / L, belong to the normal blood glucose value. It is worth noting that there is no clinical normal value of blood glucose before bedtime and scientific evidence, but it is recommended that the value of blood glucose before bedtime is generally not less than 6.0mmol / L, otherwise there is a risk of nighttime hypoglycemia. It is recommended that people measure their blood glucose regularly, especially those with a family history of diabetes. When the blood glucose value is abnormal, timely visit the endocrinology department for further diagnosis and treatment.