The result may be low if the blood glucose test paper is not full of blood, and it may also report an error and not display the result. Insufficient blood collection for fingertip glucose measurement may lead to test failure or low test results, and the test paper needs to be replaced and retested; too much blood overflowing into the test area may also affect the test results. The blood sample must be filled with the reaction area at one time, and cannot be repeated many times, or the results may also be affected. Blood glucose test strips test the fingertip capillary blood glucose, usually used to monitor blood glucose, the test is convenient, can be operated at home. However, many patients are not standardized, in addition to the blood glucose test paper is not full, there may be other problems, such as too hard to squeeze the blood, the first drop of blood did not wipe off the direct measurement, the finger touch the test area, etc., which may affect the results and lead to inaccurate. Blood glucose testing should be standardized and accurate, and any abnormalities in blood glucose should be promptly treated in the hospital under the guidance of the doctor.