High fasting blood glucose and not high after meal may be impaired fasting blood glucose or diabetes, which needs to be treated with medication under doctor’s supervision. Under normal conditions, fasting blood glucose 3.9-6.1mmol/L, two hours after meal blood glucose less than 7.8mmol/L. If the fasting blood glucose is between 6.1-7.0mmol/L, and the 2h postprandial blood glucose is less than 7.8mmol/L, it is in the stage of impaired fasting blood glucose, which is pre-diabetic, and it can be helped to lower blood glucose by increasing exercise, controlling body weight, and changing dietary habits to maintain a low-salt, low-fat, and low-sugar diet. If fasting blood glucose ≥ 7.0mmol / L, accompanied by drinking, eating, urinating and so on, can be diagnosed as diabetes, this situation is recommended to use glucose-lowering drugs under the guidance of the doctor treatment. Patients with high fasting blood glucose should consult a doctor in time, follow the doctor’s instructions for further examination and treatment, and do not use medication without authorization.