Swollen face and feet in the elderly can be induced by a variety of causes, commonly due to the following four causes: 1. heart failure, patients with edema of the face and lower extremities may be accompanied by panic, chest tightness, dyspnea and even ascites and hydrothorax, etc. 2. renal failure, patients with edema of the face, eyelids, lower extremities and the whole body, in addition to weakness, dullness, little food, anemia, proteinuria, hematuria and other symptoms. 3. In hypoproteinemia, the patient has edema, mostly low-pituitary, depressed edema in multiple parts of the body, and the serum protein concentration is significantly reduced. 4. hypothyroidism, the patient has edema mostly in the whole body or both lower limbs, symmetrical, non-depressed edema, and the thyroid function test can confirm the diagnosis of hypothyroidism.