A sedentary lifestyle can worsen swelling. When seniors sit or lie down for long periods, the muscles in the legs are less active. These muscles normally help push blood back toward the heart, so inactivity can lead to fluid buildup in the legs.

6. Wa:rning Signs of Serious Conditions

Sometimes, swollen legs may signal a more serious problem such as deep vein thrombosis (DVT). This condition involves a blood clot in a deep vein and requires urgent medical attention. Symptoms may include swelling in one leg, pain, redness, or warmth.