Swollen eyes and swollen legs may be caused by the following conditions: First, it may be a chronic functional disease of the elderly, such as chronic renal insufficiency or renal failure, heart failure and hypoproteinemia in the late stages of tumors in the elderly can cause swollen eyes, swollen legs, or even generalized swelling. Second, it may be a physiological problem, such as drinking a lot of water before going to bed, or drinking a lot of water during this period of time and due to sickness and rehydration, resulting in physiological edema, in this case get up and move around to promote blood circulation throughout the body, the swelling will naturally subside, this situation is not a disease, is a normal physiological reaction.