Blood clots can occur during any prolonged period of inactivity, but flying is one of the most common culprits. Planes require passengers to sit for long periods of time without standing or walking around. Economy class seats have little leg room, so even stretching and flexing your feet and legs can be difficult for most passengers. In addition to this lack of movement, air travel is a common cause of dehydration, which increases the risk of blood clots as well. Drink lots of fluids and move around as much as possible, especially on longer flights or flights with especially constricting leg room.
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