Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
1
Is any of this happening now?
Call 911
Call emergency services now if the person:
Is choking or having trouble breathing
Has blue, grey, or unusually pale lips or skin
Collapses, has a seizure, or cannot be awakened
Develops severe confusion or extreme weakness
Cannot swallow safely because of reduced alertness
Do not give food or drink while waiting for emergency help if the person cannot swallow safely.
And for anyone, someone who:
has lips or skin that look pale, blue, grey or blotchy
you believe has taken an overdose or swallowed something poisonous
Other emergency signs, for anyone
Someone who is struggling to breathe, gasping, choking, or cannot get words out
Someone who has chest pain, tightness or pressure lasting more than a few minutes
Someone who has sudden weakness or drooping on one side of the face or body, slurred speech, or sudden confusion
Someone who is unconscious, or cannot be woken
Someone who is bleeding heavily and it will not stop with firm pressure
Someone who has had a seizure that will not stop, or does not wake up afterwards
2
Is any of this happening?
Be seen today
Contact a poison centre promptly if:
More than a small taste may have been swallowed
The amount is unknown
The product is professional-grade, old, imported, or unlabelled
The label has a health warning
Vomiting, stomach pain, coughing, unusual sleepiness, or other symptoms occur
Exposure happened repeatedly
The swallowing was intentional
And for anyone, someone who:
has abdominal pain that is severe, constant, or getting worse
3
Does any of this apply?
Book an appointment
A routine appointment may be appropriate for repeated mouthing or eating of paint, even when each exposure is small.
Follow-up can also help if mild symptoms continue after the observation period advised by a poison specialist.
Routine follow-up is usually not needed after a small accidental taste when the product has been assessed, the person remains well, and the poison centre has advised home observation.
Every sign above is quoted from the sofidex article on Watercolor paints - swallowing. If you are not sure, err upward — it is always reasonable to be checked.