How to treat leg swelling that occurs in the elderly is mainly chosen according to what causes the leg swelling. If the swollen legs are caused by poor heart function, the main treatment for this condition is to treat the heart disease and apply cardiotonic, diuretic and dehydrating drugs to promote the swelling of the legs to subside. If the leg swelling is caused by kidney disease, this condition should also be treated for the primary cause of kidney disease. If the leg swelling is caused by poor venous return due to vascular degeneration in the elderly, the main treatment in this case is to avoid standing for a long time and to elevate the affected limb at rest to facilitate venous return and reduce swelling, and to apply blood-stasis activating drugs to promote the absorption and reduction of edema.