Eyelid swelling in patients may be caused by overuse of eyes, conjunctivitis, allergic reaction, blepharitis, renal insufficiency and so on. 1. Excessive eye use: If the patient is in a dim or bright light environment for a long time, rubbing the eyes frequently, using cell phones for a long time, etc., it can lead to excessive eye use, and the patient may have the performance of eyelid swelling, and may also have the symptoms of eye dryness, soreness and other discomfort. 2. Conjunctivitis: Bacteria, chlamydia, viruses and other pathogens infect the eye tissues, resulting in acute inflammation of the conjunctiva, under the stimulation of inflammation, patients may appear lid conjunctival congestion, edema, but also photophobia, tearing and other uncomfortable symptoms. 3. Allergic reaction: After contacting hair, dander, seafood, dust and other allergens in the eyes of allergic patients, allergic reactions to the conjunctiva, sclera and other tissues are induced, and patients may experience conjunctival edema, congestion, itching and other discomfort. 4. Blepharitis: Blepharitis refers to suppurative inflammation of the eyelid glands. Under the stimulation of inflammation, patients may experience redness, swelling, heat and pain in the eyelids. 5. Renal insufficiency: Patients with renal diseases such as glomerulonephritis may have generalized edema due to glomerular filtration dysfunction and sodium retention, and eyelid edema may occur when the eyelids are involved. It is recommended that patients with significant eyelid swelling should seek prompt medical attention to evaluate their condition and follow the doctor’s instructions for treatment.