Why am I so sick after Mexico?

Temperature changes. Traveling between different climates can confuse our bodies and make us more susceptible to illnesses because our immune systems aren't sure how to react. Your body has to readjust to the new temperature before it can fight off any symptoms coming your way, allowing you to feel sick much faster.



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Traveler's diarrhea is a digestive tract disorder that commonly causes loose stools and stomach cramps. It's caused by eating contaminated food or drinking contaminated water.

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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.

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Traveler's diarrhea is the most common illness that affects international travelers. It's usually related to a bacterial infection from consuming contaminated food or water. Most cases are mild and last for a few days. In severe cases, antibiotics may be prescribed.

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Traveler's diarrhea occurs within 10 days of travel to an area with poor public hygiene. It's the most common illness in travelers. It's caused by drinking water or eating foods that have bacteria, viruses, or parasites. It usually goes away without treatment in a few days.

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Learn some ways to treat travelers' diarrhea
  1. Drink lots of fluids. If you get diarrhea, drink lots of fluids to stay hydrated. ...
  2. Take over-the-counter drugs. Several drugs, such as loperamide, can be bought over-the-counter to treat the symptoms of diarrhea. ...
  3. Only take antibiotics if needed.


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Use over-the-counter products. Digestion relief medication that contains the active ingredients loperamide (Imodium) or bismuth subsalicylate (Pepto-Bismol, Kaopectate) helps reduce the frequency of loose, watery stools and ease cramping. Take as directed.

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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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What to do if you feel sick
  • Drink lots of water. ...
  • Electrolyte-fortified liquids. ...
  • Go easy on the solid foods, at least at first. ...
  • Avoid dairy, greasy or fried foods, and high-fiber foods or anything that upsets your stomach.
  • Don't take diarrhea medicines. ...
  • Seek medical attention if it's necessary – after TWO DAYS.


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To some extent, all food and water have bacteria, but your body knows how to handle the ones you come in contact with often. Though millions of people visit Mexico each year, only a small fraction got sick in Mexico, and most people do eat the delicious street food.

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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.

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Water or an oral rehydration solution is best. Drink at least 1 cup (240 milliliters) of liquid every time you have a loose bowel movement. Eat small meals every few hours instead of three big meals. Eat some salty foods, such as pretzels, crackers, soup, and sports drinks.

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