Older people have relatively less subcutaneous tissue and looser skin, which makes them prone to foot edema. Swollen feet in the elderly are generally divided into the following aspects: 1. if the edema is unilateral, consider whether there is occlusion or stenosis of the blood vessels in the lower extremities; if the edema in both lower extremities considers whether the patient has problems with kidney function, thus causing edema in the lower extremities; 2. liver disorders, if there is cirrhosis of the liver or liver cancer causing hypoproteinemia, edema will also occur; 3. the presence of underlying heart disorders. Acute and chronic heart failure is usually accompanied by symptoms of swollen feet; 4, the elderly lower limb veins are prone to abnormal venous valve function, impaired blood circulation, some elderly people because of sitting for a long time, double lower limbs sagging for a long time, will also appear swollen feet, but generally put the lower limbs slightly higher, especially in the afternoon, the general foot swelling will disappear; 5, nutrition problems, the elderly gastrointestinal peristaltic function decreased, appetite becomes poor, less, or because of more geriatric diseases, Become less or because of more geriatric diseases and excessive control of diet, the intake of protein is not enough, especially the intake of animal protein is not enough, there will be hypoproteinemia, will appear swollen feet.