Why do my legs have fluid after a long flight?

Leg and foot swelling during air travel is common and typically harmless. The most likely culprit is inactivity during a flight. Sitting with your feet on the floor for a long period causes blood to pool in your leg veins. The position of your legs when you are seated also increases pressure in your leg veins.



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Take a walk or exercise. A surefire way to increase blood flow is to take a walk or hit the gym. Not only could you recover more quickly, but you'll also burn calories before you indulge in a few extra treats on the road.

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Leg and foot swelling during air travel is common and typically harmless. The most likely culprit is inactivity during a flight. Sitting with your feet on the floor for a long period causes blood to pool in your leg veins. The position of your legs when you are seated also increases pressure in your leg veins.

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Travel: For some people, sitting for a long time in a car or airplane can cause fluid retention. The lack of circulation allows fluid to build up; however, the swelling usually goes away in a day or two.

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If your feet and ankles swell during a flight but the swelling subsides shortly afterward, it's not a serious concern. But if the swelling continues for hours after the flight and if the leg is red or warm to the touch or you have symptoms in only one leg, you need to seek medical care.

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The swelling is a combination of inactivity paired with the force of gravity pulling the fluids in your body toward earth. Sitting with your feet motionless for hours at a time can cause the blood to pool in the veins of your legs, but it isn't the only source of swelling. Typical mid-flight snacks are very salty.

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Swollen ankles are a common side effect of long-haul flights. They most often occur due to the buildup of fluid in the legs, known as edema. Studies show that edema is present in around 97 in 100 people who fly for more than 7 hours. In some other cases, a person's ankles may swell due to DVT.

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However, the pressure in the cabin caused by being at such a high altitude makes any air trapped in your gut expand, which causes you to feel bloated after a flight.

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