Travelers' diarrhea is the most common travel-related illness. It can occur anywhere, but the highest-risk destinations are in Asia (except for Japan and South Korea) as well as the Middle East, Africa, Mexico, and Central and South America.
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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.
Most cases of TD are the result of bacterial infection and are short-lived and self-limited. In addition to immunosuppression and sequential infection with diarrheal pathogens, ongoing infection with protozoan parasites can cause prolonged diarrheal symptoms.
Drinking milk, or ingesting other dairy products may make travelers' diarrhea worse. Alcohol and caffeine can also worsen symptoms. While you may not feel up to it, you still need to eat to keep up your strength. You should aim to eat smaller meals throughout the day, rather than three larger meals, though.
Traveler's diarrhea may get better without any treatment. But while you're waiting, it's important to try to stay hydrated with safe liquids, such as bottled water or water with electrolytes such as an oral rehydration solution (see below).
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.
Eat foods that are high in pectin, such as applesauce, bananas, and yogurt. Pectin, a water-soluble fiber, helps reduce diarrhea. Eat foods that have a lot of potassium, such as fruit juices, sports drinks, potatoes without the skin, and bananas. Potassium is often lost through diarrhea.