It is important to be vigilant when babies and children develop yellowing skin symptoms. Especially in newborns, there is a high incidence of neonatal jaundice, which is divided into physiological jaundice, which is a physiological phenomenon and can subside on its own with growth and development, and pathological jaundice, which can be caused by complex biliary atresia, infections, genetic and metabolic disorders. Non-neonates need to be excluded from malnutrition anaemia, hepatobiliary disease, genetic factors, etc.