Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
Get emergency help for severe or rapidly worsening abdominal pain, especially with fever, fainting, confusion, marked weakness, or difficulty staying awake.
And for anyone, someone who:
Contact a healthcare professional the same day if pale stool occurs with yellow eyes or skin, dark brown urine, fever, repeated vomiting, or significant upper abdominal pain.
These features can occur when bile flow is blocked or the liver or bile ducts are inflamed.
These symptoms require urgent assessment rather than waiting for a routine appointment.
Contact your baby’s healthcare professional the same day if the baby passes white, chalky, putty-colored, or very light-gray stool.
This remains important even if the baby appears comfortable.
And for anyone, someone who:
Arrange a routine appointment if pale stools continue for several days, keep returning, or are accompanied by ongoing itching, poor appetite, unexplained weight loss, or mild belly discomfort.
You should also seek advice if the change began after starting a medicine.
Every sign above is quoted from the sofidex article on Stools - pale or clay-colored. If you are not sure, err upward — it is always reasonable to be checked.