Swollen feet in the elderly may be caused by trauma, malnutrition, arthritis, kidney dysfunction and other reasons. 1. Trauma: the elderly due to too strenuous exercise or accidental falls and other reasons lead to foot muscle or ligament damage, foot pain, easy to appear foot swelling. 2. Malnutrition: Insufficient nutritional intake of the elderly, lack of protein, vitamins and other trace elements and other nutrients, can cause hypoproteinemia, edema. 3. Arthritis: Inflammation of the joints in the feet of the elderly is likely to cause swelling and pain in the joints, leading to edema of the feet, and when arthritis is more serious, it may also affect the normal activities of the elderly. 4. Abnormal kidney function: abnormal kidney function will slow down the body’s metabolic rate, water can not be excreted normally, thus triggering the symptoms of swollen feet. There are many other causes of swollen feet in the elderly, in the doctor’s advice to do the appropriate treatment, to avoid blindly use their own medication.