First, fasting blood sugar:

It is very important to measure fasting blood glucose at 6~8 am. Generally speaking, the blood sugar measured at 6~8 am is the standard fasting blood sugar.

Two hours after dinner:

The postprandial blood sugar from the first bite of food refers to the blood sugar two hours after the meal, which is two hours from the first bite of food, not from the meal. Two hours after a meal, blood sugar is generally the highest. Only measuring fasting or postprandial blood sugar may not fully reflect the control of blood sugar.

3. 2 am to 3 am:

The lowest point of blood sugar is prone to hypoglycemia at night, and 2-3 am is the lowest point of blood sugar within 24 hours. Some sugar lovers who use insulin often need to measure their blood sugar at 2-3 in the morning when their fasting blood sugar is high, so as to judge whether they can add insulin, because some fasting blood sugar may be due to high blood sugar that bounces back after hypoglycemia at night. At this time, not only can insulin not be added, but it may need to be reduced.

Extended data

Generally speaking, if the blood sugar is well controlled, it is enough to measure the fasting blood sugar every 1~2 weeks or longer, and if the blood sugar is not well controlled, it is necessary to increase the daily monitoring frequency, including the blood sugar before going to bed.

The following conditions should be closely monitored (3~7 times a day):

When the condition is unstable (such as complicated infection or hyperglycemia), when changing medicine, strengthen insulin therapy (patients who inject more than 4 times a day or use insulin pump), 1 type diabetes patients.

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