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 unresponsive, cannot be awakened, or is becoming increasingly drowsy
Is not breathing normally
Has a seizure
Has repeated vomiting, worsening confusion, or unusual behavior
Develops weakness, numbness, poor balance, slurred speech, or unequal pupils
Has blood or clear fluid coming from the ears or nose
Has an open wound, skull dent, embedded object, or bleeding that will not stop
Has severe or worsening headache
Was injured in a high-impact crash, fall from height, or similar event
Cannot be transported safely
And for anyone, someone who:
has sudden weakness or drooping on one side of the face or body, slurred speech, or sudden confusion
is unconscious, or cannot be woken
is bleeding heavily and it will not stop with firm pressure
has had a seizure that will not stop, or does not wake up afterwards
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 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 same-day medical advice for loss of consciousness that has resolved, memory loss, persistent vomiting or headache, blood-thinner use, a bleeding disorder, or symptoms that are worsening rather than improving.
And for anyone, someone who:
has a fever with a stiff neck, a rash that does not fade under pressure, or severe headache
is vomiting and cannot keep fluids down
has a new severe headache unlike any they have had before
3
Does any of this apply?
Book an appointment
Routine follow-up is appropriate for symptoms that remain stable but do not gradually improve, or that interfere with sleep, work, school, or normal activity.
Every sign above is quoted from the sofidex article on Head injury - first aid. If you are not sure, err upward — it is always reasonable to be checked.