Swelling in the ankles, feet, or legs is usually caused by fluid buildup, also called oedema. This occurs when excessive fluid leaks from blood vessels and accumulates from the encompassing tissues. Some typical causes of swollen ankles and feet include things like: "Periorbital edema" is actually a phrase for swelling https://www.sgvascularctr.com/swollen-leg-why-do-i-have-it-and-what-can-i-do/