Recognizing the Symptoms of Kidney Failure

6. Swollen ankles and edema

As kidneys fail, they become less effective at eliminating fluid. Instead of exiting the body as urine, that fluid begins to build up in other parts of the body — usually, the ankles, legs, and abdomen. The fluid that accumulates in the lungs can lead to pulmonary edema. Sodium buildup stemming from kidney failure can make the problem worse, causing extra water retention and swelling.

Some people find that diuretics help eliminate excess fluid. Doctors may also advise people with kidney failure to avoid sodium, change how much they drink, or keep their blood pressure in check.