Glycosylated hemoglobin is the average blood glucose level for 2-3 months, and the normal range of glycosylated hemoglobin is 3%-6%. It is one of the main monitoring indicators for diabetic patients to control their blood glucose, but it cannot reflect the immediate blood glucose value, nor can it reflect the fluctuation of blood glucose and whether there is hypoglycemia, and it cannot be used as a basis for confirming the diagnosis of diabetes, and it cannot replace the daily blood glucose monitoring. It is not a substitute for daily blood glucose monitoring. If you want to confirm the diagnosis of diabetes, a glucose tolerance test should be done to make a definite diagnosis. If a patient has been diagnosed with diabetes, in addition to regular glycosylated hemoglobin checks, it is also important to pay attention to daily blood glucose monitoring and frequently measure blood glucose before and after meals and at bedtime to ensure that blood glucose levels are stable and up to standard. The value of glycosylated hemoglobin can also be affected by a number of factors, such as whether the patient has a blood system disease, as well as medications and age.