Hepatitis B can usually be checked by liver function, hepatitis B two halves and hepatitis B virus DNA. 1. Liver function: Because hepatitis B patients have hepatitis B virus in their bodies, their livers may be damaged to different degrees, and this test can check the degree of liver damage of hepatitis B patients, so that patients can better understand their own conditions. 2. Hepatitis B two halves: Hepatitis B two halves is very important for early judgment of whether the patient is infected with hepatitis B. However, Hepatitis B two halves can only initially determine the active degree of the virus and understand the progress of the patient’s condition. 3. Hepatitis B virus DNA: it can understand the situation of hepatitis B virus in the body of hepatitis B patients, including the number of hepatitis B virus, replication and infectiousness. It is the “golden index” reflecting the replication of hepatitis B virus, which can understand the replication ability of the virus in the body and its infectiousness, which can help to formulate a reasonable treatment plan for the patient and judge the effect of antiviral treatment. If the patient has hepatitis B, it is recommended to go to the hospital in a timely manner, under the guidance of the doctor to carry out the appropriate program of examination.