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How long does diarrhea last?

Usually, diarrhea lasts a few days at most. Diarrhea that lasts longer may indicate a more serious problem. Diarrhea that lasts more than two days puts the person at risk for dehydration, so liquid intake should be increased. Seek medical attention if severe diarrhea lasts more than two days or earlier that if the person experiencing diarrhea is frail, elderly, or a child. 

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