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 immediately if egg exposure is followed by:
Trouble breathing, wheezing, or repeated coughing
Throat tightness, tongue swelling, or difficulty speaking
Collapse, faintness, confusion, or marked drowsiness
Pale, floppy, or unresponsive behaviour in a young child
Symptoms affecting several body systems, especially if worsening quickly
Use an adrenaline auto-injector immediately if the emergency plan says to do so.
If there is doubt between anaphylaxis and a milder reaction, follow the emergency plan and seek urgent help.
And for anyone, someone who:
is struggling to breathe, gasping, choking, or cannot get words out
Other emergency signs, for anyone
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
Do not wait for a rash.
3
Does any of this apply?
Book an appointment
Arrange a routine medical appointment if egg repeatedly causes hives, swelling, vomiting, coughing, or other symptoms.
Seek follow-up if avoidance is affecting nutrition, growth, school, or anxiety; an auto-injector needs reviewing; or you think the allergy may have resolved.
Every sign above is quoted from the sofidex article on Egg allergy. If you are not sure, err upward — it is always reasonable to be checked.