Extended sitting or inactivity can cause leg swelling. Whenever you sit for long durations, for example on a aircraft or in a desk, blood movement slows down, and fluid can accumulate during the legs. This is often generally known as “sitting ailment” or “vacation-associated edema.” Lymphedema in some cases happens https://www.sgvascularctr.com/swollen-leg-why-do-i-have-it-and-what-can-i-do/