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 swelling affects your breathing or swallowing, spreads quickly into your neck or around an eye, or follows a serious injury to your face or jaw.
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 urgent dental care for:
Facial or gum swelling, especially with fever
Severe or rapidly worsening tooth pain
A broken tooth with a red or bleeding centre
A tooth loosened or moved by an injury
Swelling or pain that makes opening your mouth difficult
3
Does any of this apply?
Book an appointment
An unusual shape that has been present for years and causes no symptoms is usually suitable for a routine dental visit.
Arrange a dental appointment if the shape is new, appears to be changing, or causes sensitivity, food trapping, mouth irritation, difficulty cleaning, or problems with your bite.
A sharp edge, loose filling, visible crack, or tooth that keeps chipping should also be checked.
Every sign above is quoted from the sofidex article on Tooth - abnormal shape. If you are not sure, err upward — it is always reasonable to be checked.