Increased hepatitis B surface antigen is usually caused by hepatitis B infection or worsening symptoms of the infection and requires prompt anti-infection treatment. Surface antigen is the substance that is wrapped around the bacterial or viral body antigen. Elevated hepatitis B surface antigen generally indicates the possibility of hepatitis B virus infection or worsening symptoms of hepatitis B virus infection in the body. If you want to determine the exact degree of hepatitis B virus infection, you can also combine various biochemical tests such as the hepatitis B penta-test to determine the number of pathogens in the body and the symptoms of infection. After the surface antigen of hepatitis B is positive or the number is obviously increased, it indicates that the body is infected with hepatitis B virus and is infectious to a certain extent, so it is necessary to carry out antiviral treatment in a timely manner and do a good job of personal protection and isolation measures to effectively avoid the spread of hepatitis B infection. After hepatitis B infection, we should consult a doctor to confirm the diagnosis in time and choose the appropriate medication under the doctor’s guidance.