Fasting blood glucose is higher than two-hour postprandial blood glucose, which may be related to taking hypoglycemic drugs, eating too little, exercising too much, etc. It is recommended to apply hypoglycemic drugs reasonably under the guidance of doctors. Normal fasting blood glucose is 3.9-6.1mmol/l, 2 hours after meal blood glucose is less than 7.8mmol/l. If diabetic patient’s fasting blood glucose is higher than 2 hours after meal blood glucose, it may be because of taking hypoglycemic drugs before meal, and it is recommended to apply the drugs reasonably under the guidance of doctor. If the patient is not diagnosed with diabetes, it may be impaired fasting glucose. Lifestyle improvement is needed, such as controlling the total calories of daily intake, actively exercising, and improving poor lifestyle habits, such as exertion and staying up late. Patients with abnormal fasting blood glucose should not take medication on their own.