The normal range of blood glucose is different at different times, blood glucose 5.6mmol/L should be divided into fasting blood glucose, random blood glucose, postprandial 2 hours blood glucose three kinds of cases to consider, no matter it is fasting blood glucose, random blood glucose, postprandial 2 hours blood glucose, 5.6mmol/L are all normal. Fasting blood glucose is the blood glucose value measured without any calorie intake for at least 8 hours, the normal range of fasting blood glucose is 3.9~6.1mmol/L, such as fasting blood glucose is 5.6mmol/L, at this time, the blood glucose belongs to the normal range. Random blood glucose is any time, regardless of the last meal time and food intake measured blood glucose, random blood glucose normal value range is less than 11.1mmol / L, such as random blood glucose for 5.6mmol / L, this time also belongs to the normal range. The 2-hour postprandial blood glucose refers to the blood glucose value measured 2 hours after a meal from the first bite of the meal, the normal range of the 2-hour postprandial blood glucose should be less than 7.8 mmol/L, such as postprandial blood glucose is 5.6 mmol/L, this time the blood glucose also belongs to the normal range. The results of a blood glucose test alone cannot completely exclude the possibility of disease, and if you feel unwell, you should consult a doctor in a timely manner.