A family history of hepatitis B does not refer to specific generations, but rather to whether or not the patient’s immediate family and relatives have hepatitis B. If they do, a family history of hepatitis B is indicated. Hepatitis B is a relatively common infectious disease that can be transmitted through mother-to-child transmission or intimate contact between relatives, so asking about the patient’s family history during the history interview is helpful in determining the source of the disease and guiding its treatment. For symptoms of liver disease, such as yellow eyes, edema, etc., if the patient has a family history of hepatitis B, it is necessary to seriously doubt whether it is hepatitis B. In the diagnosis can be biased in this direction, for example, you can do some hepatitis B related antigens, antibodies test.