Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
Call emergency services for jaundice with confusion, unusual difficulty staying awake, fainting, vomiting blood, black stools, or severe abdominal pain.
These symptoms can occur with serious liver problems, bleeding, or an infected bile-duct blockage.
Seek same-day medical advice for any new yellowing of your skin or eye whites.
This remains important if the yellowing is mild, painless, or comes and goes.
Seek urgent same-day assessment if jaundice occurs with:
A newborn needs prompt medical assessment if jaundice appears during the first 24 hours after birth.
Urgent assessment is also needed if a jaundiced baby is hard to wake, feeds poorly, has a fever, develops a high-pitched cry, or seems floppy or unusually stiff.
For routine follow-up, book an appointment if previously assessed jaundice does not clear as expected, returns, or is joined by ongoing itching, appetite loss, or weight loss.
Every sign above is quoted from the sofidex article on Jaundice. If you are not sure, err upward — it is always reasonable to be checked.