Swollen feet in the elderly may be caused by physiological and pathological reasons, including excessive exercise, cardiac failure, renal failure, hypoproteinemia and other causes. 1. Physiological causes: Swelling of the tops of the feet may be caused by excessive walking and exercise, drinking too much water, and so on. 2. Pathologic causes (1) Heart failure caused by coronary heart disease, heart valve disease, etc., peripheral venous blood return to the heart is difficult, accumulating in the peripheral vasculature, resulting in increased peripheral venous pressure, extravasation of body fluids into the peripheral tissues, resulting in swelling of the feet, chest tightness, panic attacks, shortness of breath, sedentary respiration and other discomforts, and checking the cardiac ultrasound, BNP and so on, can find abnormalities. (2) Repeated nephritis, urinary stones and other causes of renal failure, renal drainage capacity decreases, urination decreases, water and sodium retention, there will be swelling of the feet, including lower limb edema, checking renal function, renal ultrasound can find abnormalities. (3) Gastrointestinal dysfunction, poor appetite, malnutrition, over time caused by hypoproteinemia, intravascular albumin insufficiency, colloid osmotic pressure decreases, water extravasation to peripheral tissues, resulting in edema of the low hanging parts of the body, edema of the top of the feet when sitting for a long time, and checking the liver function can be found in the albumin decrease. Elderly people with swelling of the feet can also be seen in other causes, found that the swelling of the feet need to be timely hospital consultation, do not delay the treatment time.