Fasting blood glucose 6.25mmol/L, this value is impaired fasting blood glucose, this value can not be directly diagnosed as diabetes, it is recommended that low sugar, low fat diet, pay attention to strengthen physical exercise, aerobic exercise, as far as possible to make the high fasting blood glucose down to within the normal range. If there are typical symptoms of “three more and one less” (drinking more, urinating more, eating more, and weight loss) plus venous plasma glucose ≥11.1mmol/L or fasting blood glucose ≥7.0mmol/L at any time of the day, or 2-hour blood glucose ≥11.1mmol/L after OGTT, diabetes mellitus can be diagnosed. diagnosed with diabetes mellitus. Fasting blood glucose 6.25mmol/L is recommended to control the diet, which can reasonably control the daily total calorie intake and type, ensure the reasonable distribution of nutrients and regular appropriate exercise. If fasting blood glucose is not restored to normal level by the above measures, it is recommended to go to the endocrinology department and take oral hypoglycemic drugs such as metformin as prescribed by the doctor. If fasting blood glucose is found to be elevated, it is recommended to go to the hospital for regular treatment under the guidance of the doctor.