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 if pain is sudden or severe and occurs with:
Chest pressure, difficulty breathing, sweating, or fainting
New weakness on one side, facial drooping, confusion, or trouble speaking
A sudden, extremely severe headache
A major injury, uncontrolled bleeding, or a limb that looks misshapen
Loss of bladder or bowel control with numbness around the groin
Severe pain with collapse, extreme drowsiness, or blue-grey lips
Sudden severe testicular pain also needs immediate assessment.
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 medical care for severe or rapidly worsening pain, particularly with fever, repeated vomiting, a hot swollen joint, new vision changes, or a pale or cold limb.
During pregnancy, seek urgent advice for severe abdominal or pelvic pain, especially with bleeding, dizziness, or shoulder pain.
And for anyone, someone who:
has abdominal pain that is severe, constant, or getting worse
3
Does any of this apply?
Book an appointment
Arrange a routine appointment if pain lasts longer than expected, keeps returning, wakes you regularly, or affects work and daily activities.
You should also book an appointment if you develop ongoing numbness, weakness, unexplained weight loss, or need non-prescription pain medicine frequently.
Every sign above is quoted from the sofidex article on Pain. If you are not sure, err upward — it is always reasonable to be checked.