Consistently high fasting blood glucose and normal glycosylated hemoglobin usually require treatment. Glycated hemoglobin concentration effectively reflects the average blood glucose level of the past 8 to 12 weeks. Normal fasting blood glucose values are 3.9-6.0 mmol/L, 6.1-6.9 mmol/L is impaired fasting glucose regulation (prediabetes), and diabetes is diagnosed when ≥7.0 mmol/L is accompanied by diabetic symptoms. High fasting blood glucose requires prompt treatment even if glycated hemoglobin is normal. If the diagnosis of diabetes has not been reached, and the patient is in the pre-diabetes stage, the treatment is based on diet control and physical exercise; if the diagnosis of diabetes has been reached, the patient needs to take glucose-lowering medication or insulin injection on this basis. It is recommended that patients seek timely medical treatment.