Generally speaking, most newborns with hemolytic anemia occur in the first 3 days after birth. During this period, the newborn has just come out of the mother’s body and the immune function is not fully established. If the blood type does not match the mother’s blood type, for example, the newborn is Rh-negative and the mother is Rh-positive, or the mother is A blood type and the newborn is B blood type, both of these situations can lead to hemolytic anemia. In addition to hemolytic anemia, jaundice can also occur as a result of hemolytic anemia, which is often caused by the destruction of red blood cells due to blood group mismatch. The destruction of red blood cells can lead to anemia on the one hand, and the release of bilirubin on the other hand, which can cause jaundice. For hemolytic anemia, if it is mild, it can continue to be observed and can usually recover on its own, but if it is severe, it needs to be treated with blood transfusion.