Morning fasting blood glucose of 5.7mmol/L is normal. Fasting blood glucose refers to the blood glucose value measured in the early morning before breakfast after 8 to 10 hours of fasting, 3.9-6.0mmol/L is normal, 6.1-6.9mmol/L is impaired fasting blood glucose regulation, ≥7.0mmol/L at the same time when diabetic symptoms can be diagnosed as diabetes mellitus. So morning fasting blood glucose 5.7mmol/L is normal. For diabetic patients, the goal of glycemic control is generally in the fasting blood glucose 4.4mmol / L ~ 7.0mmol /, so the morning fasting blood glucose 5.7mmol / L is also normal. It is recommended to go to the hospital when abnormal fasting blood glucose values occur.