When preemies develop jaundice, it's due to elevated bilirubin levels in their blood. As a result, jaundiced babies' skin and the whites of their eyes appear yellow or orange. These visible signs of jaundice take anywhere from three to five days after birth to appear and are temporary, with skin color returning to normal once the bilirubin levels stabilize. To accelerate this process, babies are put under bright blue lights to help break down the bilirubin. They even get tiny little shaded goggles to wear to protect their eyes, not unlike the kind you'd see at a tanning salon.
Jaundice could certainly account for the "minor issue" with Beyoncé's twins that have kept them in the hospital since their birth on June 12. While the couple themselves have yet to confirm the twins' birth, Beyoncé's dad, Matthew Knowles, confirmed the twins' arrival via Instagram on Sunday.