Resection of half of the right liver may not leave sequelae. Patients with underlying liver diseases may lead to sequelae such as decreased digestion and immunity, bile leakage, abdominal infection, and in severe cases, liver failure. Depending on the condition of the original liver and the patient’s compensatory ability, the specific analysis is as follows: 1. If one’s liver does not have underlying diseases such as cirrhosis, fatty liver, hepatitis, etc., the liver can be regenerated after resection and generally no sequelae occur. 2. If the reserve function of the liver is poor, the following sequelae can occur: (1) Decrease in digestion and immunity: liver can secrete bile, which can help digestion and absorption of fats and oils. Insufficient bile secretion after liver resection may cause nausea, anorexia of grease, bloating and other manifestations. Liver can also synthesize part of immunoglobulin, liver resection may lead to protein reduction and decreased immunity. (2) Bile leakage and abdominal cavity infection: After liver resection, the patient’s own condition is poor, the compensatory ability is low, the healing of liver wound is poor, the bile in the hepatocyte and the bile in the bile ducts may leak, and the leakage of bile into the abdominal cavity will cause abdominal cavity infection, which will further lead to peritonitis and other diseases. (3) Liver failure: If the liver is in poor condition, the liver has poor compensatory ability and the liver cells can not regenerate, half of the right liver resection may induce infections and lead to aggravation of the condition and accelerate liver failure. Therefore, after half of the right liver is removed, it is recommended that patients regularly review liver function, liver ultrasound and other tests to follow up and monitor the recovery of the liver. If liver damage manifests itself, early treatment is recommended.