Liver enzymes are often elevated and bilirubin is mildly elevated on postoperative blood monitoring due to damage to liver cells during partial hepatectomy, which usually recovers quickly with hepatoprotective supportive therapy, especially in patients with hepatic cysts and hepatic hemangiomas. To minimize or control bleeding during major liver surgery, it is sometimes necessary to block the blood supply to the liver for a period of time during resection of a diseased liver, which usually does not have a significant effect on the remaining liver. However, in cirrhotic livers, hepatic ischemia and reperfusion can cause some damage to the remaining liver tissue. Elevated bilirubin is monitored after surgery, and with hepatoprotective supportive therapy, liver damage can be slowly repaired, with bilirubin slowly decreasing to near-normal levels 1-2 weeks after surgery. For patients with hepatitis B and C cirrhosis, antiviral therapy should also be used. Patients with severe cirrhosis need to receive regular treatment with oral hepatoprotective drugs for a certain period of time, and pay attention to their daily life and diet.