Blood glucose is usually measured in the blood, and most patients now take a blood glucose meter to measure it, so the test can be over in a few minutes. There are various methods to measure blood glucose, and now blood glucose can be tested on blood glucose test paper by tying the fingertips to collect blood. To measure blood glucose, first adjust the blood glucose meter, then disinfect the residual blood finger with alcohol and hang down the arm for 30 seconds. The puncture depth is selected according to the skin thickness of the finger, and an appropriate amount of blood is taken after pricking the finger, and the blood glucose test with the blood drop attached is inserted into the blood glucose meter to read the patient’s blood glucose information. Therefore, it is usually sufficient to measure blood glucose for a few minutes, and most of them can be finished in about 5 minutes. If you monitor your fingertip blood glucose at home, you should pay attention to whether the blood glucose test strips are within the expiration date. Also, note that when measuring blood glucose try to have enough blood and avoid repeated squeezing to avoid inaccurate blood glucose testing results. Usually, patients are recommended to measure blood glucose about 2 hours after meal, and the range of blood glucose 2 hours after meal is 4.4-7.8 mmol/L, which are all normal values of blood glucose after meal.