Swelling during the ankles, feet, or legs is commonly because of fluid buildup, also called oedema. This happens when extra fluid leaks from blood vessels and accumulates inside the encompassing tissues. Some common causes of swollen ankles and feet consist of: Weight problems: Carrying extra fat can tension leg veins, https://www.sgvascularctr.com/swollen-leg-why-do-i-have-it-and-what-can-i-do/