Swollen feet in the elderly may be caused by kidney disease, liver disease, heart disease or endocrine disease. 1. Kidney disease: If there are kidney diseases, such as chronic renal insufficiency, etc., it will lead to kidney function damage, which will lead to abnormal water metabolism in the body, and then lead to swollen feet. 2. Liver disease: If the elderly have cirrhosis of the liver, liver damage and other aspects of the disease, may also lead to swollen feet. 3. Heart disease: If the elderly have heart disease, such as heart failure, the water and blood in the body will be stagnant in the body, which will lead to swollen feet. 4. Endocrine diseases: If the elderly suffer from endocrine diseases such as hypothyroidism, it will lead to abnormal metabolism and swollen feet. Swollen feet in the elderly may also be caused by physiological factors, such as sedentary, standing for a long time, etc. If it is caused by pathological factors, it is recommended to seek medical treatment in time to avoid delay in treatment.