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 difficulty breathing, severe chest pain, fainting, new confusion, a seizure, sudden weakness, or a severe reduction in vision.
These are not routine features of a skin flare and need immediate assessment.
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
Arrange a prompt medical assessment for a new, rapidly appearing, painful rash, particularly if you also have fever or feel unwell.
The same symptoms can occur with an infection, so they should not be assumed to be Sweet syndrome even if you have had it before.
Seek same-day advice if you have diagnosed Sweet syndrome and develop:
New eye redness, discomfort, light sensitivity, or blurred vision
A returning fever or rapidly spreading skin lesions
Pus, increasing warmth, worsening pain, or other signs of infection
New symptoms while taking corticosteroids or another immune-suppressing medicine
3
Does any of this apply?
Book an appointment
Routine follow-up is appropriate when symptoms are improving as expected but you need treatment monitoring, help with side effects, or review of lingering skin marks.
It is also important if the condition returns after treatment.
Every sign above is quoted from the sofidex article on Sweet syndrome. If you are not sure, err upward — it is always reasonable to be checked.