It takes about three months for the liver to repair itself, but external factors and whether or not the primary disease is treated regularly will affect the liver’s self-repair cycle, and the primary disease needs to be controlled before the liver can repair itself effectively. Currently, the causes of liver damage include surgically resected liver lobes, liver segments, etc., as well as alcohol and drug toxicity to the liver, viral hepatitis, etc. For patients with surgically resected portions of the liver, it takes about three months for the liver to repair itself. For patients who have part of their liver removed by surgery, they need to maintain a good diet and lifestyle after surgery, supplement nutrition, and take some hepatoprotective drugs under the guidance of the doctor; for patients with primary liver disease, they need to deal with the primary disease in time, quit drinking and smoking, and carry out antiviral therapy for patients with hepatitis, and discontinue all the drugs with hepatotoxicity. Liver self-repair needs to be based on standardized treatment methods, patients need to actively cooperate with the doctor, follow the doctor’s instructions to avoid further deterioration of the situation.