legs, medically known as edema, occurs, when excess fluid accumulates in the tissues of the body. It can affect the foot, ankle, calves, or the entire leg, and it can occur in one or both.
Consult a doctor
Sometimes the cause is harmless and temporary. Other times, you may be referring to an underlying condition that requires medical attention.
Poor blood circulation
One of the most common causes of foot swelling is poor blood circulation. When the blood is difficult to properly return to the heart, fluid may