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 immediately for:
Sudden, severe chest, upper back, neck, jaw, or abdominal pain
Pain described as tearing or ripping, especially if it moves
Sudden fainting, severe breathlessness, weakness, or confusion
New trouble speaking, facial drooping, or weakness on one side
Sudden loss of feeling, severe pain, or coldness in a limb
Do not drive yourself if an aortic emergency may be occurring.
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
Arrange prompt medical assessment for new persistent chest or back discomfort, new hoarseness, trouble swallowing, unexplained shortness of breath, or a change in your usual symptoms.
3
Does any of this apply?
Book an appointment
Routine follow-up is appropriate when you feel well and are attending planned scans and blood pressure reviews.
Contact your healthcare service if you miss a scan, cannot take your medicine, or are unsure about activity, pregnancy, or family screening.
Every sign above is quoted from the sofidex article on Thoracic aortic aneurysm. If you are not sure, err upward — it is always reasonable to be checked.