In most cases a blood sugar of 5.25mmol/L is normal. Except during pregnancy, fasting blood glucose of 5.25mmol/L is high and not normal. In normal adults, the normal values of fasting blood glucose are <6.1mmol/L, random blood glucose <11.1mmol/L, and two-hour postprandial blood glucose <7.8mmol/L. Therefore, blood glucose of 5.25mmol/L, whether it is fasting blood glucose, random blood glucose, or two-hour postprandial blood glucose, is within the normal range. For diabetic patients, the goal of glycemic control is generally in the fasting blood glucose 4.4mmol / L ~ 7.0mmol / L, non-fasting blood glucose does not exceed 10.0mmol / L. Therefore, 5.25mmol / L, whether it is fasting blood glucose or not, is normal, belonging to the glycemic control standard. For pregnant women, fasting blood glucose normal should not exceed 5.1mmol/L, so 5.25mmol/L is on the high side, need to improve the relevant examination, timely intervention and treatment. If the blood sugar abnormalities, it is recommended to go to the hospital in time, early formal treatment.