Fasting blood glucose 8.3 means fasting blood glucose 8.3mmol/L, which is already higher than normal and is more serious. In general, the normal range of fasting blood glucose is 3.9~6.1mmol/L, fasting blood glucose 6.1~7.0mmol/L belongs to the fasting blood glucose is impaired, greater than or equal to 7.0mmol/L when considering the possibility of diabetes is relatively large, so the fasting blood glucose 8.3mmol/L has reached the diagnostic standard of diabetes, is more serious. Once diagnosed with diabetes, must actively cooperate with the doctor to take treatment, the current fasting blood glucose value of 8.3mmol / L, need to actively cooperate with the doctor oral hypoglycemic drugs, such as metformin, glimepiride, etc., it is possible to control the blood sugar in a reasonable range. For patients with elevated blood glucose, it is recommended to go to the endocrinology department of the hospital for consultation and treatment under the guidance of the doctor.