Why does chronic kidney disease cause swollen ankles?

The kidneys normally remove excess salt and water through urine. With chronic kidney disease, fluid can remain in the circulation and move into soft tissues. Gravity makes this easiest to notice at the ankles, feet and lower legs, particularly later in the day. Pressing the skin may sometimes leave a temporary indentation.

Swollen Ankles is a common presentation of Chronic Kidney Disease, but swelling can also arise from vein problems, heart conditions, medicines, injury or other causes. The location, whether both sides are involved, and how quickly it appeared are useful clinical clues.

Follow the salt, fluid and medicine advice set by your kidney clinician. Do not change a prescribed water tablet, fluid allowance or other medicine without discussing it first. When resting, raising the legs may ease dependent swelling for some people, provided this is comfortable and compatible with their care plan.

Track whether swelling is new, whether shoes or socks feel tighter, and whether you notice breathlessness, reduced urine, rapid body-weight change or swelling elsewhere. Share these observations with your clinical team.

Contact your kidney team promptly for new or increasing swelling, especially if your usual plan no longer seems to control it. Seek urgent medical help for sudden one-sided swelling with pain or redness, swelling with chest pain or breathlessness, fainting, coughing up blood, or severe shortness of breath.

Is this swelling likely to be fluid retention, and should my fluid or salt plan change? Could a medicine be contributing? Which changes in urine, breathing or leg appearance should I report quickly?