There are two possibilities for the swelling of the lower leg caused by walking more: 1, the existence of varicose veins in the lower extremity, because of the varicose veins in the lower extremity of patients with poor venous return, blood accumulation in the lower extremity is more, when long-term standing or walking more easily cause swelling, the patient lying down or rest for a night can reduce. 2, the existence of severe heart failure, heart failure of patients manifested as swelling of the lower extremity, swelling is symmetrical, when Patients walking flat or sitting for a long time can easily cause the swelling to increase. However, the swelling caused by heart failure cannot be reduced even by elevating the lower extremities, because the patient is swollen due to reduced cardiac function and not swollen due to poor venous return.