Puffy eyes in the elderly may be related to physiological factors, or it may be caused by eye allergies, eye inflammation, systemic diseases and other reasons. 1. Physiological factors: the elderly drink too much water before going to bed at night, sleep with too low a pillow or cry for a long time before going to bed, etc., which may lead to puffy eyes of the elderly. 2. Eye allergy: some elderly people are allergic, contact with willow, dust and other allergens, may lead to eye allergies, which leads to eye swelling, but also with obvious eye itching, pain and other discomforts. 3. Ocular inflammation: If the elderly suffer from conjunctivitis, blepharitis, keratitis, dacryocystitis and other inflammatory diseases of the eye, under the stimulation of inflammation, patients may appear eyelid swelling, which may also be accompanied by itching, tearing and other discomfort. 4. Systemic diseases: If the elderly suffer from hyperthyroidism, diabetes, hypertension and other systemic diseases, it may cause the patient’s eyes to be swollen, and the patient may also experience dizziness and other general discomfort. It is recommended that patients with severe eye swelling consult a doctor in time to assess their condition and follow the doctor’s instructions for treatment.