Hepatitis B (viral hepatitis type B, also known as viral hepatitis B) is caused by the hepatitis B virus (HBV), and its clinical manifestations include fatigue, loss of appetite, nausea, vomiting, aversion to oil, hepatomegaly and abnormal liver function. The incidence rate is high in developing countries, and most are asymptomatic, of which one-third show clinical manifestations of liver damage. According to statistics, there are more than 280 million asymptomatic hepatitis B virus carriers (HBsAg carriers) in the world, and about 93 million in my country. Hepatitis B includes the following types: acute hepatitis B (acute icteric hepatitis, acute anicteric hepatitis), chronic hepatitis B, severe hepatitis B, cholestatic hepatitis, post-hepatitis cirrhosis, pediatric hepatitis B virus-related nephritis, neonatal hepatitis B, hepatitis B virus arthritis, etc.