Hepatitis B surface antigen negativity is not a hepatitis problem and suggests that the patient is not infected by the hepatitis B virus or has been infected with the virus and has now been cleared. 1. Not infected by the virus: Hepatitis B surface antigen negative means that no hepatitis B surface antigen is detected in the blood, which is a benign test result, suggesting that no infection by the hepatitis B virus has occurred. 2. Infected virus has been cleared: it suggests that the patient may have been infected with hepatitis B virus in the past, but due to the strong resistance of the body, the virus will be cleared, so the hepatitis B surface antigen is also a negative problem. Clinically, if the test of hepatitis B 5 is found abnormal, it is recommended to consult the infection department or gastroenterologist in regular hospitals.