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Swelling (Edema) and Diabetes-Swelling in the Legs, Ankles and Feet. Edema commonly affects the ankles, legs, feet and wrists. Edema (known as oedema in the UK) is a build up of fluid in the body (water retention) which causes swelling. Edema commonly affects the legs, ankles, feet and wrist. Water retention is often treatable, with treatment varying depending on the cause.
But there are cases when swollen legs, ankles and feet need attention from a doctor. Here are common causes of swelling and what you can do to treat it. Causes of and Treatment for Swollen Legs Cause: Venous Insufficiency. When all is well with a personâs veins, the blood is able to pump upwards to the heart. In some cases, swollen ankles, legs and feet can be a sign that the blood is not able to fully pump back up the veins. Known as venous insufficiency, the condition occurs when the valves in the veins are damaged and canât keep blood from leaking back down.