What is the cause of neonatal pathological jaundice?

Pathological jaundice occurs within 24 hours after birth and lasts for a long time. It can be accompanied by anemia, abnormal body temperature, poor feeding, vomiting, abnormal color of urine and urine, and can appear again after regression. It can be caused by excessive bilirubin in blood, biliary obstruction, congenital non-hemolytic jaundice.