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 heavy uncontrolled bleeding, fainting with incomplete recovery, severe weakness, chest pain, trouble breathing, or swelling of the face, lips, or tongue.
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
Seek prompt medical advice if the needle site develops increasing redness, warmth, swelling, worsening pain, drainage, or a large and painful bruise.
Also seek advice for persistent numbness, tingling, weakness, or bleeding that does not stop with continuous firm pressure.
3
Does any of this apply?
Book an appointment
Routine follow-up: Contact the team responsible for the test if results do not arrive within the expected time, you are unsure how to access them, or you need help understanding the next step.
Every sign above is quoted from the sofidex article on Venipuncture. If you are not sure, err upward — it is always reasonable to be checked.