No matter fasting or postprandial blood glucose value is 22mmol/L, it has seriously exceeded the standard and is abnormal blood glucose, which needs to be handled as follows in different situations: 1. If fasting blood glucose value is 22mmol/L, you need to be hospitalized immediately for a comprehensive examination to prevent the occurrence of diabetic ketoacidosis and give intensive insulin treatment to make blood glucose decrease rapidly and reduce the damage of high glucose toxicity to the body; 2, If the postprandial or random blood glucose value is 22mmol/L, fasting, glycated hemoglobin and urine routine need to be rechecked to further clarify the diagnosis of diabetes mellitus. If the fasting blood glucose value is greater than 10mmol/L, it is better to be hospitalized. Fasting blood glucose value below 10mmol/L needs to control diet, avoid smoking, alcohol, carbonated drinks, coffee, etc., avoid overeating, increase exercise appropriately, and take oral metformin, acarbose, gliclazide tablets and other medications for treatment.