Swelling of the lower eyelid may be related to prolonged tearing, trauma, blepharitis, blepharopharyngitis cysts, or systemic diseases such as kidney disease. 1. Physiological factors: children who cry for a long time, because of fluid extravasation can lead to eyelid edema, in addition, the action of rubbing the eyes when crying will also contribute to the child’s eyelid edema, usually can subside on their own, do not need special treatment. 2. Trauma: children with eye trauma can also have swelling of the eyelids, as well as subcutaneous bruising, eye pain and other symptoms. 3. Blepharitis: Blepharitis refers to suppurative inflammation of the glands of the eyelids. Children with blepharitis may experience redness, swelling and pain in the eyelids, and abscesses may form in the eyelids of patients with advanced blepharitis. 4. Blepharoceles: Blepharoceles can be formed when the secretions are trapped in the eyelids due to blepharitis or chronic conjunctivitis, resulting in an obstruction of the outlet of the blepharoplasty glands, so that the child’s eyelids may appear elevated and swollen, often without pain. 5. Systemic diseases: If the child has acute glomerulonephritis, due to proteinuria, there may be hypoalbuminemia, and water may accumulate in the loose connective tissue at night, which may lead to eyelid edema when the child wakes up in the morning. It is recommended that children with significant eyelid swelling be seen promptly for evaluation of the condition and treatment as prescribed by the physician.