Jaundice is a phenomenon of red blood cells being broken, the liver's bilirubin metabolism function is not yet complete. Pathological jaundice in newborns can cause complications of kernicterus, which can cause death or leave sequelae of slow development in children. Therefore, mothers should recognize some signs to distinguish physiological neonatal jaundice from pathological jaundice.

Bilirubin is the main bile pigment formed from the degradation of heme in red blood cells. Bilirubin blood test is a special test necessary to assess the health status of humans.