Swollen feet in the elderly may have the following causes: First, heart disease, lower limb edema is a sign of right heart insufficiency, hypertensive heart disease, pulmonary heart disease, rheumatic cardiomyopathy, dilated cardiomyopathy and acute and chronic heart failure and other heart diseases can lead to swelling of both lower limbs, accompanied by symptoms such as jugular venous anger and respiratory distress. Kidney disease, chronic nephritis, nephrotic syndrome, acute and chronic renal failure and other diseases can lead to swelling of the lower limbs, accompanied by facial swelling, hypertension, hematuria, proteinuria and other conditions. Hypothyroidism, hypothyroidism can cause anterior tibial mucinous edema, with heavy edema, often accompanied by facial puffiness and hair loss. Peripheral vascular disease, lower limb deep vein thrombosis or lower limb deep vein valve insufficiency can also lead to lower limb swelling, lower limb vascular ultrasound can be clearly diagnosed. V. Cirrhosis of the liver, patients with cirrhosis of the liver due to protein synthesis disorders can lead to swelling of the lower limbs, often accompanied by ascites, loss of appetite, abnormal liver function. Sixth, drugs or allergies, patients allergic to cephalosporins or seafood can also appear swollen lower limbs. Standing or sitting for a long time can lead to reduced blood return to the lower extremities, resulting in edema due to blood pooling in the lower extremities.