The answer is impaired uptake of bilirubin by the liver. The bilirubin is an yellow orange pigment of bile in which the green liquid that helps in digestion and that is stashed by the liver. The bilirubin is made primarily by hemoglobin itemization at the end of red cell lifespan and finally most of it leaves the body in the feces. The two kinds are in the blood. The water insoluble or unconjugated bilirubin denotes to the pigment beforehand it extents the liver. In the liver it is transformed to the water-soluble or conjugated bilirubin which is emitted into the bile.