Glycated hemoglobin of 12.6% indicates that the patient’s blood glucose control has been poor in the past two to three months, and treatment is usually required. The normal range of glycosylated hemoglobin is 3%~6%, 12.6% is an abnormal value, and it is recommended to further improve the fasting blood glucose, postprandial 2-hour blood glucose and other tests to clarify the diagnosis. Glycated hemoglobin is clinically used to reflect the average level of blood glucose in the last 3 months, which is helpful in guiding the treatment process and monitoring the condition of diabetic patients. Diabetic patients are required to have a glycohemoglobin control range of less than 7%, which can be relaxed in complicated cases such as poor baseline conditions, multiple complications, and short life expectancy. 12.6% is a value that should be considered in the context of the actual condition of the patient to determine whether or not immediate treatment is required. In the case of a glycosylated hemoglobin of 12.6%, it is recommended to go to the hospital and ask the doctor to make a judgment, rather than making a blind judgment on one’s own.