Many diabetic patients have purchased a quick blood glucose meter in order to better measure their blood glucose, so that they can measure the level of blood glucose by gently lancing it against their finger. However, some people will squeeze the needle site to squeeze out the blood in order to make the blood drip onto the test paper faster when collecting blood. In fact, this method of measuring blood glucose by squeezing the needle site will lead to low blood glucose measurement results. In clinical practice, patients who use a lancing and squeezing method to collect blood have always shown normal blood glucose measurement results, until they developed some cardiovascular complications and went to the hospital for examination, only to find that their blood glucose was much higher than the usual measurement. The reason for this condition is that the patient excessively massages and squeezes the needle site during blood collection, which not only squeezes out the blood but also squeezes out part of the tissue fluid of the skin, causing dilution to the blood specimen and making the blood glucose test result low. The correct blood collection method is to choose the thin skin on both sides of the fingertip of the left ring finger, because the blood vessels on both sides of the finger are rich and the nerve endings are less distributed. Blood collection in this area is not only painless but also adequate and will not affect the result due to insufficient bleeding. Before collecting blood, you can hang your arm down for 10-15 seconds to make the fingertip filled with blood, and after sticking the needle, gently push the blood vessels on both sides of the finger to the front third of the finger, so that the blood can slowly spill out. In addition, when measuring finger blood glucose, it is best not to wipe the finger with alcohol. It should be noted that for patients diagnosed with diabetes, monitoring fasting blood glucose and postprandial blood glucose is not enough, but regular monitoring of glycosylated hemoglobin, generally speaking, once every 3 months. If only blood glucose is monitored and glycosylated hemoglobin is neglected, it is difficult to achieve the effect of long-term blood glucose control.