There are many causes of eyelid swelling, including the following: first, local inflammation, such as conjunctivitis, mydriasis, or keratitis caused by bacterial or viral infections, may cause eyelid swelling and requires anti-infective symptomatic treatment depending on the specific cause. Second, local allergic reactions, such as blepharitis or contact blepharitis, may also cause swelling of the eyelid and require symptomatic antiallergic treatment. Third, eye fatigue, such as frequent overnight stays or the use of computers, cell phones, and other electronic products, may cause mild swelling of the eyelids, accompanied by dryness and soreness of the eyes, and requires attention to reasonable eye habits. The fourth, mainly due to systemic diseases, such as kidney disease may cause nephrogenic eyelid edema, need to go to the hospital to improve the systemic examination.