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 signs of HUS or severe dehydration.
These include barely passing urine, blood in the urine, unusual bruising, very pale skin, swelling, confusion, fainting, extreme drowsiness, or difficulty waking.
A seizure or loss of consciousness also needs emergency help.
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
Contact a healthcare professional promptly if you have:
Bloody or black stool
Severe or worsening stomach pain
Frequent vomiting that prevents you from drinking
Diarrhea that is not improving
A high fever or significant weakness
Signs of dehydration, such as little urine or persistent dizziness
Symptoms after a known outbreak or confirmed exposure
And for anyone, someone who:
has a fever with a stiff neck, a rash that does not fade under pressure, or severe headache
has a wound that is hot, spreading red, or leaking pus
3
Does any of this apply?
Book an appointment
Routine follow-up may be needed after confirmed STEC, particularly if symptoms continue or testing showed changes in kidney function or blood counts.
The article also says
Seek advice earlier for a baby, young child, older adult, pregnant person, or someone with a weakened immune system or kidney condition.
Every sign above is quoted from the sofidex article on E. coli infection. If you are not sure, err upward — it is always reasonable to be checked.