there are many causes so to speak, the commonest being viral
hepatitis infection where the liver cells (the factory that
produces such enzymes) are destroyed by these bugs, hence the
accumulation of the bilirubin compound can bring changes to the
sclera (eye white) color...
the others include thalassaemic patients or sickle cell disease
where blood cells get destroyed prematurely at a rapid rate, and
the enzymes cannot cope with the workload, hence jaundiced...
there is also a possibility if the bile ducts are obstructed (the
site of excrement for the bile juice), can be by tumor, gall stones
or by some certain autoimmune disorders...
One can classify the causes of jaundice into prehepatic - hepatic -
posthepatic... hepatic meaning liver, and the pre and post notes
the location of the problem..