Fasting blood glucose reaches 9mmol/L to consider the possibility of diabetes, should consult a doctor in time, under the doctor’s guidance and active treatment, mainly including diet and exercise therapy and drug therapy. 1. Diet and exercise treatment: control the total intake, avoid eating too greasy food, eat more high-fiber food, eat more meals; active exercise can improve insulin sensitivity, which is conducive to lowering blood sugar. 2. Medication: If the effect of diet and exercise treatment is not good, you need to use hypoglycemic drugs under the guidance of doctor, such as metformin, acarbose and so on. During the treatment period, we should pay attention to the regular review of blood glucose changes, adjust the dosage of drugs, standardize the treatment under the guidance of the doctor, and not blindly use the drugs by ourselves.