Eye swelling found in children may be caused by local inflammation or allergies, and may also be related to systemic diseases, such as kidney disease, heart disease, and anemia. Also edema can occur with angioneurotic edema of the eyelids or with localized tumors of the orbit. If a child is found to have significant eyelid congestion and edema, along with significant pressure pain, or painful blinking, this condition is still considered to be caused by inflammation of the lid gland. In addition, inflammation of the tissues near the eyelids, such as eyelid boils, lacrimal sacs, and severe acute conjunctivitis, can also be accompanied by eyelid edema. If you notice significant redness and swelling of the eyelids along with itchiness, it may be caused by allergic factors. In particular, some children with allergies may also have eczema or allergic rhinitis. If the eyelid swelling is caused by a systemic disease, it usually occurs in both eyes at the same time and is caused by obstruction of blood and lymphatic flow, which is more common in clinical practice, such as kidney disease, heart disease, and anemia. If unilateral eyelid edema is found to exclude the possibility of intraorbital tumor, so ocular ultrasound and orbital CT examination are needed.