Poor circulation is one common cause. When blood vessels become less flexible and activity decreases, the calf muscles may not push blood upward as well, causing fluid to collect after long periods of sitting or standing.
Swelling can also be linked to fluid retention, medication side effects, high salt intake, or problems with the heart, kidneys, or liver. In some cases, sudden swelling in one leg may signal a serious issue such as a blood clot and needs medical attention.
Managing swelling may include elevating the legs, staying active, reducing salt, and using compression stockings if recommended. Because the cause can vary, persistent, painful, or sudden swelling should be checked by a healthcare professional.
