Fasting blood glucose 6.3mmol / L, for diabetic patients belong to the sugar control standard, if no other discomfort generally does not matter; if the undiagnosed population or pregnant women, respectively, belongs to the pre-diabetes, gestational diabetes, to be important, should be treated as soon as possible. 1. Diabetic patients: sugar control goals are generally in the fasting blood glucose 4.4mmol / L ~ 7.0mmol / L, fasting blood glucose 6.3mmol / L belongs to the sugar control standard, if there is no other discomfort generally does not matter, continue to adhere to the sugar control treatment. 2. Undiagnosed people: If there is no previous history of diabetes, but there is a fasting blood glucose 6.3mmol / L, consider the fasting blood glucose is impaired, which belongs to the pre-diabetes, is important, need to pay attention to the timely intervention may be restored to normal blood glucose, otherwise it will be progressed to diabetes. 3. Pregnancy status: If you are in pregnancy, fasting blood glucose value ≥ 5.1mmol / L can be diagnosed as gestational diabetes, this is a more important situation, need to be timely consultation and treatment. When fasting blood glucose 6.3mmol / L, it is recommended to go to the hospital in time, standardized treatment.