Jaundice in newborns can be caused by parental blood group incompatibility, which can lead to hemolysis, destruction of red blood cells, and further increase in bilirubin levels, which can cause jaundice, and the treatment of this condition is divided into the following two aspects: 1. If the degree of blood group incompatibility is relatively mild, the degree of hemolysis is relatively mild, the growth and development is normal, and the feeding is relatively good, only medication or mild phototherapy is needed; 2. If the degree of blood group incompatibility is severe, severe jaundice occurs, and the bilirubin level rises gradually every day, phototherapy or even blood exchange therapy should be performed in a timely manner. This is because hemolysis caused by blood type, if serious, can lead to the appearance of bilirubin encephalopathy, which can cause brain damage.