Elderly people with swollen legs and feet need to be treated according to the specific causes, such as lower extremity deep vein thrombosis, renal function abnormality, heart disease, etc. General treatment, medication, surgery, etc. will be taken after clear diagnosis. 1. Lower extremity deep vein thrombosis: Older people who are bedridden for a long period of time and lack of activities may easily cause lower extremity deep vein thrombosis, deep vein thrombosis can also cause edema, but generally bilateral edema is not symmetrical, patients are required to do lower extremity venous ultrasound, and then anticoagulant and thrombolytic treatments are taken after confirmation of the diagnosis, such as warfarin, low molecular heparin, etc., and surgery is taken to remove the thrombus if necessary. 2. Abnormal renal function: chronic kidney disease can also cause swollen legs and feet in the elderly phenomenon, should be actively taken to protect the kidneys treatment, such as olmesartan, enalapril, etc., and at the same time need to cooperate with diuretics to promote the dissipation of edema, such as spironolactone. 3. heart disease: myocardial infarction, coronary heart disease and other diseases can also cause cardiac insufficiency, or even heart failure, resulting in the phenomenon of swollen legs and feet of the elderly, should be taken to cardiac treatment, while with diuretics, such as spironolactone. Caused by the elderly legs and feet swollen for many reasons, it is recommended to go to the hospital in a timely manner to improve the examination, a clear diagnosis in the doctor’s guidance under the use of medication, not to be used indiscriminately, so as not to cause adverse consequences.