The normal value of fasting blood glucose is 4.4-6.1mmol/L, and the value of two hours after meal is less than 4.4-7.8mmol/L. In clinical practice, fasting blood glucose test and two hours after meal blood glucose test are often done to test whether a person has diabetes. One hour fasting blood sugar fluctuates greatly, which is not conducive to the diagnosis of the disease. If the fasting blood sugar is higher than 6.1mmol/L and the two-hour postprandial blood sugar value is greater than 7.8mmol/L after several laboratory tests, it can be diagnosed with pre-diabetes. If there are diabetes-related symptoms, or if the fasting blood sugar is higher than 7.0mmol/L and the two-hour postprandial blood sugar value is greater than 11.1mmol/L after repeated tests, it can be diagnosed with diabetes. Once you have diabetes, you can control your blood sugar mainly through medication. If the symptoms are caused by type 1 diabetes, insulin is often relied on to control blood glucose clinically. If it is caused by type 2 diabetes, patients can take oral hypoglycemic drugs for treatment, such as metformin extended-release tablets and glimepiride tablets for symptomatic management. Regardless of the type of diabetes, patients should take diet control and proper exercise as the basic treatment.