A healthy person’s blood glucose of 7.5 mmol/L before dinner is a random blood glucose and can be considered normal. Fasting blood glucose and 2-hour postprandial blood glucose are most commonly used to assess blood glucose status, and it is recommended to regularly monitor blood glucose at these two time points to help physicians make relatively clear judgments about blood glucose status. The normal value of fasting blood glucose is 3.9~6.1mmol/L, and the normal value of 2-hour postprandial blood glucose is 7.8mmol/L or less. Once abnormal elevation of blood glucose is detected, it is recommended to consult a doctor in a timely manner to clarify the condition under the doctor’s guidance, so as to carry out systematic treatment, so as to avoid delaying the condition and triggering adverse consequences.