Diarrhoea, vomiting, abdominal pain, food poisoning: assessing dehydration and spotting a surgical abdomen.
Thirst is not the test. Three simple things tell you where someone stands: urine, mucous membranes, and alertness.
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Pain that migrates, stops you moving, or settles in without let-up does not behave like gastroenteritis. Reading that difference is the whole point.
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Most food poisoning settles on its own within one to three days. The real risk is not the germ — it is fluid loss.
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