Neonatal jaundice is one of the most common manifestations of neonatal period, it is due to excessive bilirubin production, insufficient plasma albumin to unite bilirubin, poor hepatocyte processing bilirubin capacity, liver and intestinal circulation characteristics, thus making the bilirubin value too high, the baby appears yellow skin. Newborn jaundice receding time: 1, physiological jaundice: full-term infants 2 to 3 days after birth jaundice, 4 to 5 days to reach the peak, 5 to 7 days to subside, the latest not more than two weeks; and preterm infants jaundice is mostly seen 2 to 3 days after birth, 5 to 7 days to reach the peak, 7 to 9 days to subside, the longest can be delayed to 3 to 4 weeks. 2, pathological jaundice: pathological jaundice can appear within 24 hours after birth, jaundice lasts longer, more than two weeks for full-term infants, more than four weeks for premature infants, jaundice receding and repeated. 3, breast milk jaundice refers to breast-fed newborns, within a week after birth, due to insufficient caloric and fluid intake, delayed defecation to elevate hemoglobin, this cause of jaundice, through increasing the amount and frequency of breast milk and get relief, generally does not occur bilirubin encephalopathy, this jaundice generally does not require special treatment, there is a part of the baby is late onset of breast milk jaundice, mainly due to the components of breast milk affect The degree of jaundice is usually not heavy and may completely subside by 2 to 3 months after birth, and there are usually no other accompanying symptoms.