High fasting blood glucose and normal after meal may need treatment, which needs to be judged according to the blood glucose value. The normal range of fasting blood glucose should be at 3.9~6.1mmol/L. If it is at 6.1~7mmol/L, then it is impaired fasting blood glucose, and if it is greater than 7mmol/L, then it reaches the standard of diagnosing diabetes. Diagnostic indicators of diabetes mellitus also include 2-hour postprandial blood glucose as well as random blood glucose, while postprandial blood glucose at an unspecified point in time is generally not used as an indicator for routine clinical diagnosis of diabetes mellitus. When fasting blood glucose is elevated and the two-hour postprandial blood glucose is normal, it is considered to be caused by impaired fasting blood glucose or diabetes, and treatment is usually required in such cases. Impaired fasting blood glucose can be maintained through dietary adjustments, such as controlling total calorie intake, maintaining a diet low in sugar, salt and fat, and appropriate exercise. Patients with diabetes may also need to be treated with hypoglycemic medications such as metformin and gliclazide on top of dietary adjustments and exercise. If you have high fasting blood glucose and normal postprandial blood glucose, it is recommended that you go to the hospital in time and ask your doctor to determine if and how you need treatment.