Although most cases of travelers' diarrhea (TD) are acute and self-limited, a certain percentage of people afflicted will develop persistent (>14 days) gastrointestinal (GI) symptoms.
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Most cases are mild, but for some people it is severe. Travellers' diarrhoea tends to happen in the first week of travel. Symptoms last on average 3 to 5 days and usually get better without you needing specific treatment.
Call a doctor if you have diarrhea that is severe, lasts more than a few days or is bloody. If you are traveling, call an embassy or consulate for help locating a doctor. Other signs that you should seek medical attention include: A fever of 102 F (39 C) or higher.
Traveler's diarrhea usually goes away on its own within several days. Signs and symptoms may last longer and be more severe if the condition is caused by certain bacteria or parasites. In such cases, you may need prescription medications to help you get better.
Although traveler's diarrhea is typically a benign, self-resolving condition, it can lead to dehydration and, in severe cases, significant complications.