Understanding and Managing Swollen Feet

Swollen feet are a common symptom with many potential causes. Sometimes it’s as simple as standing too long or eating a salty meal; in other cases, swelling may signal an underlying health condition that requires medical attention. Understanding the range of possible causes—from lifestyle factors to serious issues like heart or kidney disease—can help you recognize when foot swelling is harmless and when it’s a warning sign. In some cases, managing the condition may be as simple as elevating your feet or cutting back on sodium. In others, swelling may be the first sign of a chronic illness that needs targeted treatment.

1. Heart and kidney diseases

Heart and kidney function are closely linked, and when either system isn’t working properly, fluid can build up in the body—including the feet. Kidney disease reduces the kidneys’ ability to filter waste and excess fluid from the blood. As damage progresses, swelling may appear in the feet, ankles, or legs. Heart disease can also lead to foot edema when the heart isn’t pumping effectively, causing blood to pool in the lower extremities.

These two conditions often overlap. High blood pressure, for example, can damage the kidneys, and people with kidney disease are at significantly higher risk for heart complications. In mild cases, diuretics may help remove extra fluid. In advanced kidney failure, dialysis may be required.