Impaired liver function in babies can be caused by infection, genetics, medications and other factors. The child may have digestive system symptoms such as nausea and vomiting, and may also have systemic symptoms such as jaundice and fatigue. 1. Digestive system symptoms: the symptoms of liver function injury in babies are related to the severity of the injury. If the injury is mild, there may be no obvious symptoms, but if the injury is more serious, it may cause the baby to have abnormal digestive symptoms, including anorexia, nausea, vomiting, loss of appetite, abdominal distension, abnormal stools, etc., which is the main symptom of liver function injury. 2. Jaundice: liver dysfunction can lead to abnormal bile pigment metabolism in the baby’s body, and more obvious jaundice may appear, which is manifested as yellowing of the skin, yellowing of the sclera, yellowing of the urine and so on. 3. Others: Besides, babies may also have non-specific symptoms such as fatigue, poor spirit, drowsiness and so on. Once the baby has loss of appetite, lethargy, jaundice and other symptoms, parents should pay attention to it, take the baby to the hospital in time, carry out liver function laboratory tests, clarify the cause of the disease, and give targeted treatment if necessary.