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 for sudden, severe chest, upper back, neck, or abdominal pain, especially if it feels tearing or is accompanied by breathlessness, fainting, sweating, weakness, or trouble speaking.
These symptoms can have several causes, but in Turner syndrome they require urgent assessment for an aortic emergency.
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 urgent medical assessment for new chest pressure, unexplained severe shortness of breath, fainting during activity, a very rapid or irregular heartbeat with weakness, or new neurological symptoms.
3
Does any of this apply?
Book an appointment
Arrange routine medical follow-up if you notice:
Reduced hearing, ringing in the ears, or repeated ear infections
New headaches or dizziness that could relate to blood pressure
Unusual tiredness, feeling cold, constipation, or weight changes
Periods stopping unexpectedly
Persistent abdominal symptoms or unexplained changes in liver tests
Increasing anxiety, low mood, or difficulty coping
The article also says
Children should be assessed if their growth slows, puberty has not started as expected, or swelling of the hands and feet is present in infancy.
These findings do not prove Turner syndrome, but they can justify further evaluation.
Every sign above is quoted from the sofidex article on Turner syndrome. If you are not sure, err upward — it is always reasonable to be checked.