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 help if you have:
Trouble breathing, wheezing, or throat tightness
Severe swelling of the tongue, lips, or throat
Fainting or difficulty staying awake
Breathing symptoms after smoke from burning plants
And for anyone, someone who:
you believe has taken an overdose or swallowed something poisonous
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
2
Is any of this happening?
Be seen today
Get prompt medical advice if the rash:
Involves the eyes, mouth, face, or genitals
Causes severe facial swelling or swollen-shut eyes
Covers a large area of the body
Produces severe itching that prevents sleep or normal activity
Shows possible infection, such as pus, fever, worsening pain, or spreading warmth
Is not starting to improve after about a week
Continues beyond several weeks
Has an uncertain cause or looks different from previous reactions
3
Does any of this apply?
Book an appointment
Routine follow-up is reasonable for a mild rash that is improving as expected.
A pharmacist can also help you choose an appropriate nonprescription product and check whether it is safe with your other medicines or health conditions.
Every sign above is quoted from the sofidex article on Poison ivy - oak - sumac. If you are not sure, err upward — it is always reasonable to be checked.