To screen for hepatitis B, you need to start with a hepatitis B half-pair and a liver function test. If the liver function test shows elevated aminotransferases, bilirubin, or decreased albumin, it indicates liver damage. Combined with the Hepatitis B 2.5 test, if the Hepatitis B surface antigen is positive, it indicates infection with the Hepatitis B virus. At this time, further examination is needed, you can do the hepatitis B virus HBV-DNA and liver ultrasound examination, if the hepatitis B HBV-DNA is elevated and the liver ultrasound has diffuse changes, it means that the inflammatory response of liver injury is due to the hepatitis B virus. In the case of acute hepatitis B, hepatoprotective and symptomatic supportive therapy is needed. In the case of chronic hepatitis B, in addition to liver preservation and symptomatic supportive therapy, intensive antiviral therapy is needed.