If an older person develops swollen feet: First, heart failure should be considered. In right heart failure, abdominal ascites and chest pleural fluid will appear, and both ankles and both lower limbs will gradually swell from morning and spread gradually to the upper body. Secondly, for patients with chronic renal insufficiency, there will be a large amount of proteinuria and hypoproteinemia, which will lead to swelling around the body and other situations. Third, once endocrine metabolic dysfunction and disorders occur in the elderly, such as hypothyroidism and adrenocortical insufficiency, swelling of the feet of both lower limbs and spreading to the lower legs may also occur. Fourth, older people with severe malnutrition and nutritional metabolic disorders will also have the above-mentioned conditions.