Cause of jaundice post tonsillectomy in a 14 year old. My son has been drinking some, though spiked a fever yesterday, was very dry, received IV fluids at clinic, urine remained brown. pushed fluids at home, still urine brown this am, beginning to have slight yellow eyes, stomach ache, vomiting once, urine yellow to dark yellow, has had 120 cc of dark to amber urine. What else can we do, or do we have an urgent situation?