Enlargement of the liver may be caused by acute viral infection, venous obstruction, right heart failure, intrahepatic congestion causing enlargement of the liver, which may be reduced by medication or surgical means. 1. Acute viral infection causes liver enlargement: Take antiviral (lamivudine tablets, etc.) and liver-protecting drugs (magnesium isoglycyrrhizate, etc.) as prescribed by the doctor. After the virus is cleared, the inflammation and swelling of the liver will subside. 2. Obstruction of vena cava or hepatic vein leads to congestion and swelling of the liver: through surgery, the obstructed vein will be restored to smooth, and the liver will subside after normal congestion is restored. 3. Enlargement of liver caused by right heart failure and intrahepatic stagnation: cardiovascular system related examination is needed to comprehensively determine the causes of right heart failure, liver enlargement and intrahepatic congestion of the patient, and then treat them through surgery. If the examination finds that there is hepatomegaly, it is recommended to consult the doctor in time to avoid delaying the condition.