Parents know that soon after birth, the baby will appear jaundice, but for their own baby, jaundice is which cause, parents must be very concerned, then, cause baby jaundice are what causes it? Physiological jaundice Most newborns will have physiological jaundice, because the fetus in the intrauterine low oxygen environment, the blood of the red blood cells produced too much, and most of these red blood cells are immature, easy to be destroyed, after the birth of the fetus, resulting in excessive bilirubin production, about twice as much as adults; on the other hand, due to the immaturity of the newborn liver function, so that the metabolism of bilirubin is restricted, resulting in jaundice in newborns for a period of time . Jaundice characteristics: physiological jaundice in term infants appear on the 2nd-3rd day after birth, the skin is light yellow, the sclera (white eyes) is mainly blue with a slight yellow, urine is slightly yellow but does not stain the diaper, the most yellow on the 4th-5th day, 2 weeks to subside, check the liver function is normal, serum unconjugated bilirubin increased. Physiological jaundice in preterm infants will appear earlier, higher and last longer, and will not subside until about full term. Response: Physiologic jaundice is a normal physiologic phenomenon and the child is not in any discomfort and needs close attention! Breast milk jaundice This is a special type of jaundice. Because breast milk contains progesterone hormone, it can inhibit the activity of glucuronosyltransferase in the newborn’s liver, so that the bilirubin in the blood cannot be metabolized and excreted in time, the concentration increases, and a yellow stain of the newborn’s skin and sclera appears. Jaundice characteristics: the child is breastfed and its jaundice exceeds normal physiological jaundice. If you stop breastfeeding for 48 hours, the jaundice drops significantly, and if you breastfeed again, the jaundice rises again. Response: When breast milk jaundice occurs, when the newborn grows and develops well and other non-physiological causes of jaundice are excluded, there is no need to stop breast milk when the total bilirubin is less than 15mg/dl, but attention should be paid to higher than 15mg/dl and promptly go to the hospital for treatment. Hemolytic jaundice The most common cause of hemolytic jaundice is ABO hemolysis, which is caused by incompatibility between the blood type of the mother and the fetus, with the mother’s blood type O and the fetus’ blood type A or B being the most common and causing more severe jaundice; others such as the mother’s blood type A and the fetus’ blood type B or AB; the mother’s blood type B and the fetus’ blood type A or AB being less common and causing less severe jaundice. Jaundice characteristics: hemolytic jaundice is characterized by the appearance within 24 hours after birth, and gradually worsens, and is easily recognized. Response: If the symptoms are mild due to ABO blood type, medication or phototherapy can be used. Severe cases can be treated with blood exchange early. 04 Obstructive jaundice Obstructive jaundice is mainly seen in congenital intrahepatic hepatic duct or extrahepatic biliary atresia, which is clinically characterized by white clay-colored stools 2 to 3 d after birth, after the fetal stool is excreted, until 1 to 1.5 months later. Jaundice characteristics: When jaundice is severe, the surface of the stool or its shallow layer is light yellow. Jaundice appears about 1 week after birth and worsens progressively. The liver is enlarged and progressively aggravated, and the texture becomes tough and finally hard. There is no anemia on routine blood tests, and early blood direct bilirubin increases progressively, and after 1 to 2 months, indirect bilirubin also increases due to liver function impairment. Response: After biliary atresia is clearly identified by cholangiography, early surgical treatment is performed. Infectious jaundice Occurs as a result of viral infection or bacterial infection, etc., which impairs liver cell function. Viral infections are mostly intrauterine, with cytomegalovirus and hepatitis B virus infections being the most common, and other infections such as rubella virus, EBV, and toxoplasmosis are less common. Jaundice features: persistent jaundice after physiological jaundice or persistent jaundice after physiological jaundice subsides. The cause of the infection varies greatly in terms of the main symptoms, time of onset and duration of jaundice, and severity of the jaundice period. Response: If the mother insists on prenatal care and examination, it is rare for the child to develop infectious jaundice. Infectious jaundice needs to be treated for its cause. Newborn jaundice medical signals Whether jaundice requires medical attention, parents can pay attention to the following points: 1. Observe the degree of jaundice: If the skin on the abdomen or below is yellow, or if the skin is yellowing quickly (such as yellowing quickly extends from the face to the chest and abdomen), it needs to be sent to the doctor for examination. In addition, jaundice within 24 hours of birth, or jaundice receding and reappearing, jaundice in full-term infants for more than 2 weeks, jaundice in preterm infants for more than 2-3 weeks, is also a sign of pathological jaundice, it is best to send to the doctor for examination. 2. Observe other symptoms: vomiting, pale complexion, poor vitality, loss of appetite, bloating, diarrhea, fever, thick tea-colored urine, white stool, etc. If you have any of these conditions, you should take them to the doctor immediately for examination. 3, pay attention to certain factors that aggravate jaundice: such as premature birth, lack of oxygen during delivery, family history of hemolytic diseases (such as sericea), possible infection before or after delivery (such as the mother had a fever infection before delivery, early water breakage) are also things to pay attention to, and inform the doctor of this medical history when you go to the hospital.