Fasting blood glucose 6.48mmol/L can be controlled firstly by diet and exercise, and if necessary, medication is needed to control it. Fasting blood glucose is the value of blood glucose concentration before meal in the next morning after fasting overnight, which is an important indicator for diagnosing glucose metabolism disorder. Currently, the normal range of fasting blood glucose is 3.9~6.1mmol/L, and the two-hour postprandial blood glucose should be less than 7.8mmol/L. Fasting blood glucose normal value is generally lower than 6.1mmol / L range, if fasting blood glucose 6.48mmol / L is higher than the normal value, belonging to the fasting blood glucose is impaired. It is recommended to have a low sugar diet, moderate activity, monitor the blood glucose situation, and if necessary, take medication under the advice of a doctor. In case of fasting or two-hour postprandial blood glucose elevation, it is recommended to go to the hospital, and under the guidance of the doctor’s advice, the correct treatment.