The patient’s eyelids are itchy and swollen, which may be caused by angioneurotic edema, blepharitis, allergic blepharodermatitis and so on. 1. Vasoneurotic edema: if the patient rubs his eyes regularly and forms adverse stimulation to his eyes for a long period of time, it may lead to an increase in the permeability of the blood vessels inside the eyelids, resulting in vasoneurotic edema, which causes the fluid in the blood vessels to leak into the interstitial space of the subcutaneous tissue, and the patient may have the uncomfortable symptom of eyelid itchiness and swelling. 2. Blepharitis: Due to poor eye hygiene, the eyelid margins of patients are infected by bacteria and other germs, inducing blepharitis, which can cause discomfort such as itchy and swollen eyelids, and can be accompanied by tearing, pain and other symptoms. 3. Allergic blepharitis: When allergic patients’ eyes come into contact with dust, pollen or cosmetics, it may lead to allergic reactions in the local skin, inducing allergic blepharitis, resulting in itchy and swollen eyelids. It is recommended that patients with itchy and swollen eyelids consult a hospital in a timely manner to assess their condition and take active treatment under the guidance of a doctor.