Normally, finger blood test for hepatitis B antibody is not accurate, and it is generally recommended to take venous blood for hepatitis B antibody test. Because of the very small amount of blood collected from the finger, it is often used for routine blood tests, blood glucose and the screening of hepatitis B surface antigen. Since the blood volume of finger blood is limited and the amount of blood collected is too small, which can easily affect the accuracy of the test results, venous blood is usually taken to check the hepatitis B antibody. The day before the test, you should be careful not to drink alcohol, do not eat too stimulating food, pay attention to good sleep, to ensure sufficient sleep quality. Hepatitis B antibody is one of the tests in the 5 items of hepatitis B. For normal people, the 5 items of hepatitis B should be rechecked once every three to five years, and if the positive titer of hepatitis B surface antibody is very high, then there is no need to inject hepatitis B vaccine; if there is no antibody, then the hepatitis B vaccine should be injected in time.