Swelling of the lower eyelid is usually caused by infection, allergy, trauma or systemic diseases. 1. Infection: eye infections can lead to swelling of the lower eyelids, such as granuloma, blepharitis, blepharitis and other diseases, in the inflammation of the stimulus, there can be swelling of the eyes, the patient can follow the doctor’s instructions to use tobramycin eye drops, erythromycin ophthalmic ointment and other medications, to promote the recovery of the condition. 2. Allergic factors: eye allergy patients can also appear eyelid swelling, usually accompanied by local skin itching and other symptoms, patients can follow the doctor’s instructions to use sodium cromoglycate eye drops, flomilon eye drops and other drugs. 3. Traumatic factors: eye trauma patients because of external stimulation, there may be local eyelid tissue damage, resulting in eyelid reactive edema. 4. Systemic diseases: When patients have cardiac or renal diseases, it may cause water-sodium metabolism disorders, which may result in eyelid edema, such as heart failure, renal insufficiency and so on. It is recommended that patients with significant eyelid edema should seek timely medical attention to assess their condition and follow the doctor’s instructions for treatment.