How long it takes for an infant to recover from impaired liver function depends on the severity and cause of the impairment. There are many causes of liver function impairment in infants, and the most common causes are viral infection and improper use of medication. When liver function is impaired, it is important to complete the relevant examinations first to clarify the cause of the impairment and to understand the exact extent of the impairment. If the child’s liver function is damaged due to cold virus, liver function will recover with the recovery of the disease, mostly in 1-2 weeks. However, if the child is infected with a more specific virus, such as EBV or cytomegalovirus, etc., timely antiviral and hepatoprotective treatments are needed, but the course of the disease is relatively long and the recovery will be relatively slow. In addition, if it is drug-induced liver injury, the specific recovery time of each patient will be different depending on the degree of liver injury, and should be actively treated under the guidance of the doctor, in order to prevent the induction of severe hepatitis and further prolong the course of the disease.