Liver abscess may be caused by intestinal infection, biliary tract infection and sepsis. 1. Intestinal infection: if the patient suffers from intestinal infection, such as appendicitis or bacillary dysentery and other diseases. At this time, bacteria enter the liver through the portal vein and it is easy to produce liver abscess. 2. Biliary tract infection: if the patient suffers from gallstones or purulent cholangitis and other diseases, it will also lead to liver abscess. 3. Sepsis: Because of the low immunity of septic patients, bacterial infections in other parts of the body can easily invade the blood system, thus causing bacteria to grow and multiply in the liver, and ultimately triggering the phenomenon of liver abscess. 4. Diabetes mellitus: diabetes mellitus patients when the blood sugar control is poor, can be complicated by bacterial infection caused by liver abscess. It is recommended that patients with liver abscess should go to the hospital in time, under the guidance of professional doctors to clarify the cause of the disease and take effective treatment.