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
Seek emergency help for:
Trouble breathing, swelling of the face or throat, or severe chest pain
Fainting, collapse, a seizure, or difficulty waking
Sudden weakness, facial drooping, confusion, or trouble speaking
Heavy bleeding that does not stop with firm pressure
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 the treating team promptly for fever, chills, a new rash, worsening pain, increasing bruising, or redness and discharge at a catheter site.
Also call about ongoing tingling, muscle cramps, unusual weakness, dark urine, or yellowing that is returning.
For a newborn, seek prompt assessment for worsening jaundice, poor feeding, unusual limpness, a high-pitched cry, or increasing sleepiness.
Mild access-site tenderness and planned repeat blood tests are usually part of routine recovery, but symptoms that are worsening should not wait for the next appointment.
Every sign above is quoted from the sofidex article on Exchange transfusion. If you are not sure, err upward — it is always reasonable to be checked.