Blood glucose meter measured three times are not the same may be a normal phenomenon, the blood sugar in the body is originally a dynamic value, every moment of blood sugar is changing. A blood glucose meter is an instrument used to monitor blood glucose. The blood glucose measured is fingertip blood, which is relatively accurate, but it is still a little different from venous blood. The results of a glucose meter are generally very reliable for monitoring the condition of a diabetic patient. Generally speaking, the fasting blood glucose value is lower in the early morning, and the blood glucose value before and after meal is also different. Clinically, fasting blood glucose, two-hour postprandial blood glucose and random blood glucose are commonly used to determine the progress of diabetes. Currently, blood glucose meters are still relatively simple and convenient to carry, and can be done at home under the guidance of a doctor. If a diabetic patient finds that his blood glucose fluctuates abnormally many times, he should go to the hospital in time and receive standardized treatment under the doctor’s guidance.