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
Seek emergency care if:
Bleeding is heavy, spurting, or does not stop with firm pressure
The scrape followed a serious crash, fall, or crush injury
Bone, muscle, or other deep tissue is visible
There is major loss of feeling, movement, or blood flow
An object is deeply embedded in the wound
There are signs of a serious head, neck, chest, or abdominal injury
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 prompt medical advice if the wound is large, very painful, on the face or near an eye, or cannot be cleaned properly.
You should also get advice for a scrape caused by a human or animal bite or scratch.
3
Does any of this apply?
Book an appointment
Routine follow-up is appropriate if the scrape is not steadily healing, keeps reopening, or leaves persistent tenderness or embedded material after the immediate injury has settled.
The article also says
Do not pull out a deeply embedded object.
It may be limiting bleeding and should be removed by a trained professional.
Contact a healthcare professional if pain, redness, warmth, or swelling is increasing; pus or a bad smell develops; red streaks appear; or you have a fever or feel unwell.
Earlier assessment is sensible if you have diabetes, poor circulation, reduced sensation, or a weakened immune system.
Ask about tetanus protection if the wound is dirty or your vaccination history is incomplete or uncertain.
Every sign above is quoted from the sofidex article on Scrape. If you are not sure, err upward — it is always reasonable to be checked.