Fasting blood glucose 7.8mmol/L in the morning, if diagnosed with diabetes, can be actively dietary control and exercise therapy, while taking hypoglycemic drugs or selecting insulin for treatment as prescribed by the doctor. Normally, normal adults should have fasting blood glucose <6.1mmol/L and two-hour postprandial blood glucose <7.8mmol/L. Diabetes can be diagnosed if fasting blood glucose ≥7.0mmol/L or random blood glucose ≥11.1mmol/L, accompanied by the symptoms of polydipsia, polyphagia, polyuria and weight loss. Therefore, fasting blood glucose 7.8mmol/L has reached the diagnostic standard of diabetes. Patients can actively control the total calorie intake, eat small meals and regular diet. Pay attention to physical exercise and insist on exercise. Choose metformin, acarbose and other medications under the guidance of the doctor. Secondly, for diabetic patients with surgery, pregnancy, or diabetic complications can choose Menthol and Glycine insulin under the guidance of the doctor for treatment to control the blood sugar in the ideal range. If the blood sugar is abnormal, it is recommended to consult the doctor in time and standardize the treatment under the doctor's guidance.