Hepatitis B Virus Surface Antigen (HBV SA) test results are greater than 500, which is usually indicative of Hepatitis B Virus (HBV) infection. Hepatitis B virus surface antigen is the outer shell of the hepatitis B virus, which can be found in the patient’s blood, and the test can determine whether the patient is infected with the hepatitis B virus. Normal value is negative, the hepatitis B virus surface antigen test result is more than 500, it suggests that the patient is infected with hepatitis B virus, and the virus is in the active stage. At this time, it is necessary to analyze with the results of Hepatitis B five, and if necessary, further testing to clarify whether there is liver function damage and the activity of hepatitis B virus. If the virus is active and liver damage is present, treatment is needed. If the hepatitis B virus surface antigen test result is greater than 500, immediately go to the hospital for further examination, do not delay, so as not to lead to the development of the disease process.