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 for:
Heavy bleeding that does not stop with firm pressure
Difficulty breathing
Swelling around an eye, new vision problems, or severe eye pain
Confusion, fainting, or a sudden severe headache with nasal symptoms
Most ozena symptoms are managed through planned follow-up rather than emergency treatment.
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 you develop increasing facial pain, swelling, fever, pus-like discharge, or bleeding that keeps returning.
These changes may indicate infection or another problem that needs treatment.
3
Does any of this apply?
Book an appointment
Arrange a routine medical appointment if you have persistent nasal crusting, an unexplained unpleasant smell, repeated minor nosebleeds, or a lasting reduction in smell.
An ENT assessment is especially useful if you have had nasal surgery, injury, or radiation treatment.
Every sign above is quoted from the sofidex article on Ozena. If you are not sure, err upward — it is always reasonable to be checked.