Glycated blood glucose should be referred to as glycated hemoglobin here. Glycated hemoglobin does not drop to normal in a short period of time after blood glucose control is normalized, and generally glycated hemoglobin may return to normal in 2-3 months after blood glucose control is stabilized. Glycated hemoglobin is produced by combining hemoglobin with sugar, and is mainly used to monitor the average value of blood glucose in the last 2-3 months, and its results are not affected by any one time of hyperglycemia or hypoglycemia. Therefore, glycated hemoglobin does not drop to normal within a short period of time when blood glucose control is normalized, but usually returns to normal 2-3 months after blood glucose stabilization. For patients with diabetes mellitus or abnormal glucose tolerance, regular monitoring of blood glucose and glycated hemoglobin values is required under the guidance of a doctor. In daily life, it is recommended to avoid intake of high-sugar foods, such as cookies, pastries, candies and watermelon. When discomfort occurs, seek medical advice promptly.