The time it takes to recover from liver function injury is closely related to the cause of liver function injury and varies from person to person. The liver is an important organ for detoxification and digestion in the body, and many causes can lead to liver function impairment. If liver function abnormalities are caused by eating too greasy food or staying up late, it will recover in about 3-5 days after a light diet and adequate rest. If liver function abnormalities are caused by long-term alcohol consumption, liver function can mostly be recovered in about 2 months after quitting drinking. If liver function abnormalities are caused by viral hepatitis, liver function can usually be recovered in about 3 months after controlling the virus. In case of liver function abnormalities caused by cirrhosis of the liver and liver cancer, the prognosis is poorer and most patients’ liver function cannot be completely restored to normal. Patients with impaired liver function must pay attention to a light diet and quit drinking and smoking. In addition, most drugs are metabolized by the liver, so patients must not take drugs on their own to avoid aggravating liver function damage.