Swollen eyes in children may be related to eye diseases, nephrogenic diseases, cardiogenic diseases and other reasons. 1. Ocular diseases: patients with conjunctivitis, blepharitis and other ocular diseases, under the stimulation of inflammatory factors, can cause swelling of the skin around the eyes, which may be accompanied by photophobia, conjunctival congestion and other uncomfortable symptoms. 2. Nephrogenic diseases: patients with renal diseases such as nephrotic syndrome, due to the loss of large amounts of protein, causing a decrease in plasma colloid osmotic pressure, intravascular fluid infiltration into the tissue interstitial space, may also appear in ocular edema manifestations, can also be accompanied by lower limb edema and other discomforts. 3. Cardiac disease: right heart insufficiency and other cardiac diseases, because of the body circulation stagnation, there may be tissue fluid leakage into the tissue space and the performance of eyelid edema. It is recommended that children with obvious eye swelling consult the hospital in time to clarify the cause of the disease and standardize the treatment under the guidance of the doctor in order to avoid delaying the condition.