What happens to your gut when you fly?

Quigley. The greater the difference between the pressure in the atmosphere and that in your body, the more the air in your stomach is going to expand — and that's why you begin to feel bloated while flying. Bloating is annoying enough on its own, but if it persists, it can also contribute to constipation.



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Even though the air in your cabin is pressurized, the air pressure is still much lower than what you're used to at ground level. That lower pressure causes the gases in your gut to expand, resulting in bloating and gassiness, Dr. Movassaghi says.

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A lack of oxygen or the proverbial thin air, as is common at high altitudes or during flights, can trigger inflammation in the intestinal tract in people with a corresponding predisposition.

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It's possible that traveler's diarrhea may stem from the stress of traveling or a change in diet. But usually infectious agents — such as bacteria, viruses or parasites — are to blame. You typically develop traveler's diarrhea after ingesting food or water contaminated with organisms from feces.

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Equally important is to restore your gut to full function. “Go for a walk to kickstart the digestive system and drink plenty of fresh warm or room temperature water, Nishtha advises. Try and eat a big green salad or other vegetables and fruits to get fibre into your system and get the bowels moving again, she adds.

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Jet lag is a temporary sleep disorder, but not temporary enough for many travelers. If you're flying from San Francisco to Rome for a 10-day trip, for example, it may take six to nine days to fully recover. That's because it can take up to a day for each time zone crossed for your body to adjust to the local time.

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“First of all, the stress associated with catching with your flight and getting to the hotel can make your symptoms worse. But also being away from your usual place of eating and going to the bathroom can disrupt the bowels.

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The dry air and low air pressure in long flights is dehydrating. “Dehydration due to low humidity levels in the cabin can slow down digestion and worsen constipation and preexisting IBS symptoms,” Surapaneni explains. Consider bringing a refillable water bottle with you on the plane.

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Airplane belly happens when your body doesn't release all of the excess gas it accumulated throughout the duration of the flight. So even though you've landed at your final destination, you might not feel as relieved as you would like to be.

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Aircraft cabin air is also very dry... This will make you dehydrated whether you feel thirsty or not.... and dehydration adds to fatigue after flights. Combine the two.... less oxygen per breath and dry air, and no wonder you feel done in at the end of a flight.

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Air travel Airplanes can be breeding grounds for bacteria and viruses, from cramped conditions to the low humidity that characterizes the air circulating on board. Low humidity can dry out your nasal passages and irritate your throat.

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How come? “The pressure, temperature and oxygen levels in the cabin fluctuate, and the humidity level is lower than it is at sea level,” says Matthew Goldman, MD. All of those things can mess with some of your body's normal functions.

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It's really down to physics. Pressurised cabins on aeroplanes are having an effect on the air inside you, so as the cabin pressure decreases, the air inside the bowel expands by up to 30% more than usual, and that needs to get out.

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Circadian rhythms change as people fly through different time zones. Researchers have found that these changes affect the metabolism and the levels of certain bacteria in the intestines, both of which can result in weight gain.

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