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
Go to an emergency department after an injury if:
The ankle is clearly deformed or bone is visible
The foot becomes cold, pale, blue, or persistently numb
There is uncontrolled bleeding or a deep open wound
The injury followed a major fall, collision, or crushing force
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 same-day care if the ankle is hot, red, and swollen and you have a fever or feel generally unwell, as this can indicate infection.
Same-day assessment is also sensible after an injury if you cannot take a few steps, swelling is severe or rapidly increasing, or pain remains intense despite rest.
Get prompt advice if you have diabetes, poor circulation, reduced feeling in your feet, or a weakened immune system and develop swelling, redness, or a wound.
And for anyone, someone who:
is getting rapidly more short of breath, or has gained several pounds in a few days with swelling
has abdominal pain that is severe, constant, or getting worse
3
Does any of this apply?
Book an appointment
Book a routine appointment if pain worsens, keeps returning, interferes with normal activities, or is not clearly improving after about two weeks of self-care.
Persistent morning stiffness, unexplained swelling, or pain in several joints also needs assessment.
Every sign above is quoted from the sofidex article on Ankle pain. If you are not sure, err upward — it is always reasonable to be checked.