Bacterial liver abscess is mainly infected through biliary tract, portal vein and hepatic artery, and active treatment is recommended. 1. Biliary tract: when some lesions may lead to obstruction of the biliary tract, and if infection occurs at this time, leading to pyogenic cholangitis, bacteria may travel up the biliary tract, thus triggering bacterial liver abscess. 2. Portal vein: some bacteria in the body can break through the intestinal barrier and enter the liver through the portal vein, thus triggering bacterial liver abscess. 3. Hepatic artery: In septic lesions in any part of the body, such as bacterial endocarditis, septic osteomyelitis, etc., when complicated with bacteremia, bacteria can invade the liver via the hepatic artery. In addition, in open liver injury, bacteria can directly invade the liver through the wound to cause infection and abscess formation. Invasive treatments for other diseases of the liver, such as transhepatic arterial chemoembolization, ablation, and other oncologic treatments, may also lead to liver abscesses. If a bacterial liver abscess occurs, it is recommended to seek prompt medical attention and active treatment under the guidance of a doctor to avoid delaying the condition.