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 for:
A seizure
Loss of consciousness or difficulty waking
Severe or rapidly worsening confusion
Serious breathing difficulty
Do not delay emergency care while trying to correct symptoms with salt, food, sports drinks, or fluid restriction.
And for anyone, someone who:
is bleeding heavily and it will 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 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
These symptoms need urgent assessment, whether or not low sodium is already known.
Seek prompt same-day medical advice for new confusion, marked drowsiness, repeated vomiting, severe headache, worsening unsteadiness, or significant muscle weakness.
This is particularly important if you have a known low sodium result or recently started a medicine that can affect sodium.
3
Does any of this apply?
Book an appointment
Arrange routine follow-up if a blood test shows mildly low sodium and you feel well.
The result still needs review to identify the cause and decide whether repeat testing is needed.
Every sign above is quoted from the sofidex article on Low blood sodium. If you are not sure, err upward — it is always reasonable to be checked.