Generally speaking, blood from either finger can be used to measure blood glucose, and it generally does not have much effect on the results of the test. The ring finger and little finger are the least action in the use of fingers, and the pain is weak, the other fingers have a higher usage rate, especially the thumb and index finger, after lancing to get blood, it is easy to have pain and infection when touching other items, at the same time, the epidermis of these two fingers is rough, and it is not easy to lance them. Blood glucose monitoring is a very important part of diabetes treatment, the frequency of blood glucose monitoring should be carried out under the guidance of the doctor, blood glucose if the control is not good, usually have to increase the frequency of blood glucose measurement, and even up to 7 times / day, if the blood glucose control is stable, it may be sometimes only need to measure 2-3 times / week. Don’t squeeze the fingertip hard when measuring blood glucose, so as not to contain too much tissue fluid in it, which will make the value of blood glucose not constant and inaccurate. If the patient’s blood glucose is high, it is recommended to visit the hospital in time for further examination.