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 or go to an emergency department immediately for:
Heavy or continuing bleeding from the mouth or throat
Vomiting a large amount of fresh or dark blood
Difficulty breathing, fainting, severe weakness, or confusion
Inability to swallow saliva together with breathing difficulty
Do not eat or drink unless emergency professionals tell you to.
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
Someone who has lips or skin that look pale, blue, grey or blotchy
Someone who you believe has taken an overdose or swallowed something poisonous
2
Is any of this happening?
Be seen today
Contact your surgical team promptly for pain that is not controlled as instructed, repeated vomiting, worsening fever, inability to take medicines, or signs of dehydration such as very dark urine, much less urination, dizziness, or a dry mouth.
Fresh bleeding after a tonsillectomy needs urgent medical assessment, even if it appears to stop.
3
Does any of this apply?
Book an appointment
Do not remain at home waiting for a routine appointment.
The article also says
Sit upright and spit blood out rather than swallowing it while waiting for help.
Every sign above is quoted from the sofidex article on Tonsillectomy. If you are not sure, err upward — it is always reasonable to be checked.