Swelling in the legs of the elderly may be caused by cardiogenic edema, hepatic edema, renal edema, nutritional edema and so on. 1. Cardiogenic edema: due to cardiac insufficiency causes venous stasis in the body circulation, so that the body tissue interstitial excessive fluid accumulation, thus triggering the calf edema, and accompanied by jugular varicose vein pressure elevation and other symptoms, serious patients will continue to love your pleural effusion, ascites, etc.. 2. Hepatogenic edema: due to portal hypertension, leakage of hepatic lymphatic fluid, hypoalbuminemia and other factors, it will lead to swelling of the calves in the elderly, accompanied by jaundice, hepatomegaly, splenomegaly and so on. 3. Renal edema: If the elderly suffer from acute glomerulonephritis, chronic nephritis, diabetic nephropathy, etc., which affects the normal function of the kidneys, it will lead to the difficulty of discharging the water in the body, which will lead to the swelling of calves. 4. Nutritional edema: If the elderly have a poor appetite for a long time, which hinders the absorption of protein and leads to the lack of protein in the body, thus the phenomenon of edema occurs. It is recommended that patients go to the hospital in a timely manner, under the guidance of the doctor, the relevant examination, according to the patient’s specific examination results, to take targeted treatment.