Why is my baby’s skin yellow?
The yellowish color of the skin in newborns is called "jaundice". It may occur on the first days of life due to the accumulation of bilirubin, a pigment present in red blood cells.
The liver is the organ that sends bilirubin from the bloodstream to the gut, which in turn expels it from the body through the stools. The first days of life, the liver functions slowly; bilirubin is not cleared fast enough; it builds up in the blood, and enters all organs, including skin and brain. If bilirubin reaches very high levels in the brain, it can damage the neurons.