The number of days for jaundice to subside is mainly determined by the nature of jaundice. First, for full-term newborns, the jaundice that appears is physiological jaundice, which can subside in 5-7 days, and the longest time will not exceed two weeks. Secondly, for premature newborns, most jaundice will subside in 7-9 days after birth, with a maximum duration of 3-4 weeks. Thirdly, if the newborn baby has pathological jaundice, due to the different principles of its pathogenesis, the time needed to subside will also be different. Pathological jaundice is usually caused by diseases, within 24 hours of the birth of newborn babies, jaundice symptoms, after 2-3 weeks of birth, jaundice symptoms will continue to aggravate, the need for timely treatment. Fourth, if the jaundice of the newborn is caused by sepsis, the jaundice will last for 1-2 weeks or even longer, this symptom is relatively more serious, and the number of days the jaundice needs to subside is determined by its specific nature.