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
Get emergency help for fainting, confusion, severe weakness, difficulty breathing, chest pain, or signs of severe dehydration.
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 prompt medical advice if you have:
Diarrhoea that is worsening or prevents normal eating and drinking
Very little urine, a dry mouth, or dizziness when standing
Blood in the stool or black, tar-like stool
Fever with continuing diarrhoea
New numbness, tingling, weakness, or balance problems
Noticeable weight loss or symptoms of anaemia
A child who is unusually sleepy, has sunken eyes, produces very little urine, or cannot keep fluids down also needs urgent assessment.
3
Does any of this apply?
Book an appointment
Arrange a routine medical appointment if you have diarrhoea that continues after tropical travel or residence, especially with weight loss, tiredness, greasy stools, or reduced appetite.
Mention all recent and past travel, even if symptoms began after you returned.
Every sign above is quoted from the sofidex article on Tropical sprue. If you are not sure, err upward — it is always reasonable to be checked.