The reference range for glycosylated hemoglobin is 4% to 6%, so a glycosylated hemoglobin of 6.24% is outside the normal range and is serious. Glycated hemoglobin is the combination product of glucose and hemoglobin in human blood, which can reflect the average blood glucose level in the past three months, and glycated hemoglobin is the gold standard for reflecting the status of blood glucose control. The reference range for glycosylated hemoglobin is 4% to 6%, and a glycosylated hemoglobin of 6.24% exceeds the upper limit of normal. Glycated hemoglobin 6.24% has not yet reached the diagnostic criteria for diabetes mellitus, and can be refined with fasting blood glucose, 2-hour postprandial blood glucose, and glucose tolerance test. If the patient is diabetic, it is usually recommended that the glycosylated hemoglobin be controlled below 7%. If the glycosylated hemoglobin is controlled at 6.24% at this time, it suggests that glycemic control is fair. It is recommended that patients with abnormal glycosylated hemoglobin should seek medical attention, control their diet under the guidance of a doctor, and monitor their blood glucose, applying hypoglycemic drugs if necessary.