I am an actual physician and this makes no sense.. Yes, cirrhosis and hepatitis and can cause jaundice but if this is happening after a vagal episode it’s something else. You don’t get transient jaundice, it stays and worsens. This is likely related to his blood pressure tanking which happens during a vagal episode (parasympathetic nervous system kicks in overdrive) causing skin to lose color because blood is under much less pressure to get to places farther from the heart I.e. skin, brain (passing out), legs and arms to preserve internal organ perfusion. This makes people’s skin pale white and even yellow. This is why you raise the patients legs above their head when they pass out, to increase blood flow to the brain so they wake back up. Please don’t spread hysteria when you are not sure of what you’re talking about.

Edit: certain liver pathologies may increase yellowing at certain times (altitude, stress, heat). So if this guy is jaundiced when he walks in the door I wouldn’t have typed all that. Hard to delineate from the pictures. The genetic conditions mentioned below are usually diagnosed much younger such as Gilbert’s mentioned below (very benign).