Swollen eyelids in children may be caused by physiological factors, allergic reactions, blepharitis, kidney dysfunction and other reasons. 1. Physiological factors: if the children work and rest irregularly, often stay up late or excessive crying, eyes by mosquito bites, etc., eyelid swelling may occur, these factors are physiological reasons, generally do not need special intervention. 2. Allergic reaction: If the children themselves belong to the allergic body, after contact with certain allergens, such as pollen, dust mites, etc., may cause patients with eye allergies, resulting in eyelid swelling and other discomforts, but also eye redness, itchy eyes and other discomforts. 3. Blepharitis: If the child has inverted eyelashes and often rubs his eyes with his hands, especially when his hands are dirty, blepharitis may be induced, and under the stimulation of inflammation, the patient may have swollen eyelids, which may be accompanied by eyelid congestion, tearing and other manifestations. 4. Renal dysfunction: children with glomerulonephritis and other diseases, because of renal hypoplasia, can lead to the body’s water discharge obstacles, more water to the local tissue space penetration, the child may appear eyelid swelling. It is recommended that children with significant eyelid swelling should be seen promptly for evaluation of their condition and treatment in accordance with medical advice.