The normal value of jaundice for a newborn at 7 days is 257umol/L or less. Neonatal jaundice is a yellowing of the skin and other organs caused by the accumulation of bilirubin in the body, and is a common clinical problem in newborns today. The normal value of neonatal jaundice at 7 days is 257umol/L. At birth, the production of bilirubin is greater than its excretion, and therefore almost all newborns experience temporary elevation of bilirubin to varying degrees in the early stages of life. Jaundice in full-term newborns usually appears 2-3 days after birth, peaks at 4-5 days, subsides in 5-7 days, and should not last more than 2 weeks initially, whereas in preterm infants, it can take up to 3-4 weeks to subside, and the daily serum bilirubin elevation is <85umol/L. Note: When neonatal jaundice occurs, it is recommended to consult a doctor in time to clarify whether it is physiological jaundice or pathological jaundice, and target treatment.