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 or go to an emergency department after a major injury if the hip looks out of shape, the leg appears shortened or turned, or you cannot move or feel the leg normally.
A cold, pale, or numb foot also needs emergency care.
Seek emergency care for hip or back pain with new loss of bladder or bowel control, numbness around the genitals or buttocks, or rapidly worsening leg weakness.
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 same-day urgent assessment if:
You cannot put weight on the leg, especially after an injury
The hip is hot or swollen and you have a fever or feel unwell
A child has sudden hip pain, limps, or refuses to walk
Pain is severe and began suddenly without a clear reason
And for anyone, someone who:
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 lasts more than about two weeks, keeps returning, is getting worse, or affects sleep or everyday walking.
Earlier review is sensible if you have cancer, take medicines that weaken the immune system, or have recently had hip surgery.
Every sign above is quoted from the sofidex article on Hip pain. If you are not sure, err upward — it is always reasonable to be checked.