Walking a lot of leg swelling, mainly consider the following kinds of diseases: 1, heart failure. Mainly seen in chronic right heart failure, caused by blood return to the right atrium of the resistance to increase, causing the whole body organs of the blood, lower extremity venous return is not good, thus causing walking more when the legs are swollen. 2, lower extremity deep vein thrombosis. It is mainly seen in patients with less activity of lower limbs, such as drivers of long-distance buses or long-distance travelers, due to the reduced activity of lower limbs, it is easy to form deep vein thrombosis of lower limbs which affects the venous return of lower limbs, and it causes leg swelling when walking a lot. 3, hypoalbuminemia. The most common are serious liver disease and serious kidney disease, serious liver disease patients often eat poorly, malnutrition, at the same time the liver function is reduced, albumin synthesis is reduced; serious kidney disease often lead to albumin large amount of loss from the kidney, both of these two conditions are easy to lead to hypoalbuminemia, easy to cause lower limb edema. 4, in the lower limb saphenous vein varicose vein, part of the patients due to deep venous valve closure insufficiency leads to leg swelling, which becomes more obvious when walking.