It is not normal for jaundice to rise one day after stopping breastfeeding. Breastmilk jaundice usually decreases after 72 hours of stopping breastfeeding, and jaundice also decreases after one day of stopping breastfeeding, but not significantly. Therefore, it may not be normal for the jaundice level to be high one day after stopping breastfeeding, and it may not be breast milk jaundice. It may be caused by hemolytic jaundice or bile duct obstruction jaundice. Hemolytic jaundice: Due to the destruction of a large number of red blood cells, a large amount of unconjugated bilirubin is formed, which exceeds the ability of the liver cells to take up, conjugate, and excrete, and the bilirubin in the blood rises, resulting in the yellowing of the skin, sclera, and mucous membranes. Obstructive bile duct jaundice: Obstructive jaundice occurs when the bile ducts are blocked. For example, if the bile ducts of young children are narrowed or blocked, there is no way for the bile to enter the duodenum, and the pressure in the bile ducts rises, causing bile duct dilatation, and the bile backs up into the bloodstream and increases bilirubin, which can cause obstructive jaundice. If jaundice is high after stopping breastfeeding for a day, it is seriously recommended to go to the hospital for examination to avoid serious consequences.