Hepatitis B is an infectious disease caused by infection with the hepatitis B virus. Both carriers of hepatitis B and patients with hepatitis B are the main sources of infection for this disease, but the two have different meanings. A hepatitis B carrier is an infected person whose hepatitis B surface antigen positivity persists for six months or more while the liver function is basically normal, and a hepatitis B patient is a patient who carries the hepatitis B virus and is developing the disease, with a damaged liver. Hepatitis B virus carriers can be divided into active hepatitis B carriers and chronic hepatitis B virus carriers, who are infected with the hepatitis B virus but have no serious effect on the liver and no clinical symptoms. The former is active and highly infectious, with normal liver function, and requires early active antiviral treatment; the latter is inactive and generally not infectious, and does not require special treatment, but should develop good living habits and regularly review liver function and hepatitis B two-to-one half. Patients with hepatitis B often have clinical liver lesions, such as nausea, anorexia and abdominal pain, etc. When checking liver function, transaminases may be elevated to different degrees. Both hepatitis B carriers and hepatitis B patients should pay attention to strengthening physical exercise, enhancing body immunity, avoiding strain, overeating, smoking, etc., developing good living habits, actively treating and preventing the deterioration of the disease.