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 for trouble breathing, a seizure, fainting, severe confusion, sudden weakness on one side, or difficulty speaking.
These symptoms can have several causes, but they require immediate assessment.
Signs of a severe allergic reaction after treatment—including facial or tongue swelling, widespread hives, wheezing, or breathing difficulty—also require emergency care.
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 urgent same-day care for:
New vision loss, eye pain, or marked changes in vision
Sudden hearing loss or severe new balance problems
A rapidly worsening neurological symptom
Increasing redness, drainage, or fever around an ulcer
3
Does any of this apply?
Book an appointment
Arrange a routine medical or sexual-health appointment if you have a persistent unexplained lump, a skin ulcer that is not healing, ongoing bone pain, or concerns about past syphilis that may not have been treated.
These problems usually are not emergencies, but they should be assessed rather than watched indefinitely.
Every sign above is quoted from the sofidex article on Gumma. If you are not sure, err upward — it is always reasonable to be checked.