Puffy bags under the eyes are not necessarily caused by diseases, but may also be caused by physiological reasons, and may also be related to eye allergies, kidney dysfunction, eye infections and other pathological factors. People who drink a lot of water before going to bed and stay up late can have puffy eyes, and improving their daily routine can generally relieve them, without the need for special treatment. If allergic patients come into contact with allergens such as pollen, hair, etc., an allergic reaction can occur, resulting in swelling of the lower eyelids, which can also be accompanied by itchy eyes, conjunctival congestion, edema and other discomforts. Bacterial conjunctivitis, dacryocystitis and other eye infections, under the stimulation of inflammation, eyelid swelling can occur, and may also be accompanied by photophobia, tearing and other discomfort. In addition, patients with systemic diseases such as renal dysfunction, heart failure, etc. may have impaired fluid metabolism, which may be manifested as swelling of the lower bags of both eyes, and may be accompanied by swelling of the legs, dyspnea, and other uncomfortable symptoms. It is recommended that patients with significant swelling of the eyelids consult a doctor to evaluate their condition and choose the appropriate treatment as prescribed by the doctor.