Children with a yellowish complexion that does not eat may be anemic or may be caused by other diseases. The more common clinical causes are mainly seen in the following: 1. Anemia: When a child is anemic, there will be a significant whitening of the lips and mouth, and a yellowish face, accompanied by a decreased appetite and a lack of eating performance. If you want to determine whether it is anemia, you can do a routine blood test. If it shows that the hemoglobin or red blood cell value is significantly lower than normal, it means that the child is anemic; 2. Liver disease: Having hepatitis due to viral infection will lead to a significant increase in transaminases and a significant decrease in appetite, while jaundice may occur due to liver disease, not only the face is yellow, but also the sclera will appear yellow. If the above symptoms appear, liver function can be checked to see if transaminases are significantly higher and if viral antibodies are positive to clarify whether the child has viral hepatitis. 3. Biliary tract diseases: If the child has diseases such as cholecystitis or biliary stones, he or she may also have a decreased appetite, a yellowish complexion, and a yellowish sclera. In addition to checking the blood routine and liver function, an ultrasound examination of the abdominal biliary tract should be performed to clarify the presence of biliary tract diseases.