Jaundice in babies who are not yet full-term (within 28 days of birth) is called neonatal jaundice. Neonatal jaundice is a condition characterized by jaundice of the skin, mucous membranes and sclera in the newborn period due to the elevation of bilirubin level in blood caused by abnormalities in bilirubin metabolism, and the disease can be classified into physiologic and pathologic. Physiologic jaundice appears 2-3 days after birth, reaches its peak in 4-6 days, and subsides in 7-10 days. It lasts longer in preterm infants and has no other clinical symptoms except for a slight loss of appetite. If jaundice appears 24 hours after birth and does not subside in 2 to 3 weeks, or even continues to deepen and aggravate, or recurs after subsiding, or starts to appear only one week to several weeks after birth, it is pathologic jaundice. Delayed breastfeeding (late breastfeeding), vomiting, hypoxia during and after birth, cold and late expulsion of meconium can aggravate physiological jaundice. Neonatal ABO hemolysis, RH hemolysis, congenital biliary atresia, infantile hepatitis syndrome, septicemia, etc., can cause pathological jaundice. Severe jaundice can cause bilirubin encephalopathy (kernicterus), which is a life-threatening disease, and even if life is saved in time by resuscitation treatment, cerebral palsy will remain in the future. If you find jaundice, whether it is physiological or pathological, you should consult a professional doctor for timely diagnosis and treatment, and never wait for the jaundice to subside naturally. Some babies although jaundice naturally subside, but caused damage to the brain, young mothers do not know; some babies jaundice continued for a long time did not subside, and finally had to go to the hospital for treatment, spending a lot of medical expenses, and even individual babies due to progressive aggravation of jaundice and life-threatening, or although the life of the brain damage left behind (cerebral palsy), and so on, it is not to scare mothers, it is not uncommon in pediatrics clinic. Many mothers have not attended the mother-to-be class before giving birth to a baby, so how to sit on the moon, how to feed and care for the baby (newborn) in the month, almost entirely entrusted to the elderly or nannies, and the traditional old people will believe that: sitting on the moon should be tightly closed windows and doors, and even curtains have to be drawn, the home dark, for fear that the baby is stimulated by the sound and light scares, every day, as long as to give the baby a good milk to feed the baby, all is well! So, in the dim light, whether the baby has jaundice is very difficult to detect, perhaps, many parents simply do not have the concept of “jaundice”. Whether the mother how to sit in the moon, must not let the baby in the dark home to spend the newborn period, as long as it is not cold and windy weather, every day should open the window ventilation, so that the natural light into the room, if the temperature permits, it is best to give the baby a diligent bathing, which not only facilitates to find out whether the baby has jaundice, but also on the baby’s brain development is very favorable. If jaundice is found, whether it is physiological or pathological, you should consult a professional doctor for timely diagnosis and treatment, and never wait for the jaundice to subside naturally.