When jaundice, which should normally disappear in about 1 week or 10 days, does not subside by half a month, or even remains after 3 weeks, the mother and the people around her start to worry. When the book is opened, there is a possibility of several diseases (such as neonatal hepatitis syndrome and congenital biliary atresia) if the jaundice does not subside. However, as long as the jaundice begins to gradually tend to fade and the baby is healthy and feeding, and the stools do not turn white, you can wait for a while. In healthy infants born at full term and normal, even if the period of jaundice is prolonged, it is usually a continuation of physiological jaundice. Especially if the baby is breastfed, the prolonged period of jaundice is more understandable. This is because there are substances in breast milk that affect the regulation of bile pigments in the liver. At this point, if the breast milk is replaced with milk, it can cause the jaundice to subside faster. However, mothers generally think that it is better to continue breastfeeding while feeding shrimp soup rather than to stop the breast milk that they have been able to secrete. It is not uncommon for babies weighing less than 2.5 kg at birth to have jaundice that does not subside by 1 month of age.