Children with poor liver function may have general symptoms such as dry mouth and bad breath, digestive symptoms such as nausea and vomiting, central nervous system symptoms such as drowsiness, and jaundice symptoms such as yellowing of the skin. 1. General symptoms: Decreased liver function may lead to symptoms such as bitter mouth, dry mouth, bad breath, accompanied by discomfort and vague pain in the liver area, weakness of the limbs, mental weakness, easy to fatigue, liver palms, spider nevus, ascites and other manifestations. 2. Digestive system symptoms: the synthesis of digestive enzymes decreases, thus affecting the digestive function, nausea, vomiting, greasiness, loss of appetite, milk refusal, diarrhea, abdominal pain, diarrhea, constipation and so on. 3. Central nervous system symptoms: when liver function is seriously impaired, liver transaminase abnormality causes elevated blood ammonia, leading to hepatic encephalopathy, the child may have cognitive impairment, fluttering tremor, lethargy, lethargy or even coma and other symptoms. 4. Jaundice symptoms: decreased liver function leads to abnormal bile pigment metabolism, elevated serum bile pigment causes yellow staining of sclera, skin, mucous membranes and body fluids. Children with poor liver may also have blurred vision, night blindness and other vitamin metabolism abnormalities, it is recommended to consult a doctor for a clear diagnosis and targeted treatment.