Diabetes cannot usually be ruled out by a glycosylated hemoglobin of 5.2% alone. Glycated hemoglobin is the product of combining sugar in the serum and hemoglobin in the red blood cells, which can reflect the control of blood glucose in the past 2 to 3 months, and its normal range is 4%~6%. Therefore, glycated hemoglobin of 5.2% belongs to the normal range, but diabetes can not be ruled out by glycated hemoglobin of 5.2% alone. To determine whether you have diabetes, you need to conduct a fasting blood glucose, glucose tolerance test and other tests, combined with clinical symptoms. If you suspect that you have diabetes or have symptoms that suggest diabetes, it is recommended that you go to the hospital and ask the doctor to make a judgment based on the specific situation.