Swollen legs are a common problem among older adults and are often linked to normal aging, but they can also be a sign of underlying health conditions that need medical attention. As the body ages, circulation, kidney function, and lymphatic drainage may become less effective, making fluid buildup in the lower legs more likely because gravity naturally pulls fluid downward.

One of the most common causes is poor circulation. Blood vessels gradually lose flexibility, and the calf muscles, often called the **“second heart,”** may not move blood back toward the heart as efficiently when physical activity decreases. This can cause fluid to collect around the ankles and feet, especially after sitting or standing for long periods. Reduced movement can further slow circulation, allowing swelling to become more noticeable over time.

Fluid retention, or edema, is another major cause and may occur when the heart, kidneys, or liver are not working properly. These organs help control the body’s fluid balance, and problems affecting them can lead to swelling in both legs. Eating too much salt may also worsen the condition by increasing water retention. In addition, some medications used to treat blood pressure, pain, or inflammation can contribute to swollen legs, especially in older adults taking multiple prescriptions.

Although swelling is often harmless, it should not always be ignored. If it develops suddenly, affects only one leg, or is accompanied by pain, it may signal **“deep vein thrombosis (DVT)”**, a condition that requires immediate medical care because of the risk of serious complications.

Simple steps such as staying active, elevating the legs, wearing compression stockings, and reducing salt intake may help relieve mild swelling. However, persistent or worsening symptoms should always be evaluated by a healthcare professional to identify the underlying cause and determine the most appropriate treatment.