Fasting blood glucose 7.5mmol/L once the diagnosis of diabetes mellitus has been confirmed then medication needs to be considered. If a transient increase in blood glucose is caused by stress, infection, etc., it is recommended to actively treat the primary disease. The normal range of fasting blood glucose is 3.9~6.1mmol/L, and if it reaches or exceeds 7.0mmol/L, then it reaches the standard of diagnosing diabetes, so the fasting blood glucose of 7.5mmol/L is on the high side and reaches the standard of diagnosing diabetes, and if it is combined with the typical symptoms of diabetes at the same time, then it can be diagnosed under the guidance of the doctor. Once diagnosed with diabetes mellitus, it is necessary to control blood glucose by diet control and appropriate exercise. If blood glucose cannot be well controlled by diet control and exercise alone, it is necessary to consider taking oral hypoglycemic drugs, such as metformin, acarbose, etc., or injecting insulin for treatment. In case of abnormal fasting blood glucose, it is recommended to go to the hospital and ask the doctor to make a judgment.