HBsAg is one of the clinical indicators of hepatitis virus pathogenicity test, fully known as hepatitis B surface antigen. HBsAg positive indicates that hepatitis B virus (HBV) has been infected, that is, the patient is a carrier of HBV and is not normal. Although HBsAg is not contagious, it is dependent on HBV, so HBsAg-positive patients are also one of the main sources of hepatitis B infection. When patients have HBsAg positive symptoms, they need to improve hepatitis virus pathogenic tests, such as anti-HBs, HBeAg, anti-HBe, HBcAg, anti-HBc, etc., under the guidance of professional doctors in order to judge the condition. In addition, patients with hepatitis B will mostly have liver function impairment, so they also need to improve serum enzymes, serum protein, serum and urine bilirubin tests, etc. in order to develop a follow-up treatment plan. If diagnosed as acute hepatitis B, HBsAg positivity at this time is self-limiting and recovery is more likely. Such patients can take supportive treatment, such as the use of some liver protective drugs to promote recovery, such as vitamins, glucuronolactone, etc., and pay attention to regular review of liver function, liver ultrasound, hepatitis virus pathogenicity testing and other items to avoid turning into chronic hepatitis B. If diagnosed as chronic hepatitis B. In addition to conservative treatment, additional antiviral therapy, such as treatment with interferon, telbivudine, entecavir and other drugs, is needed under the guidance of a professional doctor. If HBsAg-positive patients have sexual partners, they should be vaccinated against hepatitis B in time and pay attention to the use of safety measures, such as condoms. Do not mix personal items such as dishes, toothbrushes, and water glasses in daily life, and eat a light diet, avoid smoking and alcohol, and maintain a good mood to promote recovery.