Glycated hemoglobin of 6.3% is abnormal and slightly above the normal range. Glycated hemoglobin is 4% to 6% in normal people and reflects the average blood glucose level over the last 2-3 months. Glycated hemoglobin of 6.3% is higher than normal, suggesting a recent rise in blood glucose, while fasting and 2-hour postprandial blood glucose should be monitored and combined with the presence or absence of diabetes symptoms such as polyphagia, polyphagia, emaciation, etc. to comprehensively assess the condition. Diagnostic criteria for diabetes mellitus: Fasting blood glucose ≥7.0 mmol/L, or 2-hour post-glycemic load blood glucose ≥11.1 mmol/L, or random blood glucose ≥11.1 mmol/L, accompanied by the symptoms of three more and one less (polydipsia, polyphagia, polyuria, and weight loss), diabetes mellitus can be diagnosed. Glycosylated hemoglobin 6.3% is recommended to seek prompt medical attention for examination and treatment under medical supervision.