Extended sitting down or inactivity can cause leg swelling. Whenever you sit for long intervals, like with a plane or in a desk, blood movement slows down, and fluid can accumulate while in the legs. This is commonly generally known as “sitting sickness” or “travel-relevant edema.” Obesity: Carrying extra weight https://www.sgvascularctr.com/swollen-leg-why-do-i-have-it-and-what-can-i-do/