The patient’s eyes have been swollen, may be caused by physiological factors, may also be caused by pathological factors, such as keratitis, conjunctivitis and so on. 1. Physiological factors: if patients stay up too late or drink too much water before going to bed, eyelid swelling may occur, which belongs to physiological edema, generally do not need special treatment, and can be relieved after rest. 2. Keratitis: If the patient’s cornea is traumatized or infected by bacteria, and corneal inflammation occurs, the patient may experience swelling of the eyes, and eye pain and other uncomfortable symptoms. 3. Conjunctivitis: Conjunctivitis can be caused by bacterial, viral and allergic factors. If the patient has chronic conjunctivitis, under the stimulation of inflammation, the patient may experience prolonged swelling of the eyes, and may also experience discomfort such as photophobia and tearing. It is recommended that children with significant eye swelling seek medical attention to evaluate their condition and follow the doctor’s instructions for treatment.