Itchy swelling of the upper eyelid can be caused with inflammation of the eye, allergic diseases, angioneurotic edema, etc. The cause should be clarified and then the symptomatic information. 1. Inflammation of the eye: Inflammatory cells can destroy the normal cells of the surrounding tissues, leading to cell degeneration, edema, oozing, etc., which can cause itchy and swollen upper eyelids. Common inflammatory diseases of the eye mainly include infectious conjunctivitis, scleritis, keratitis, uveitis and so on. 2. Allergic diseases: allergy can lead to eye capillary dilation, increased vascular permeability, so that the contents of the blood vessels leak out into the tissue space, resulting in swelling and itching of the upper eyelid. Allergic reaction is due to the use of eye cosmetics, skin care products or pollen, dust contact caused by skin allergic reaction. 3. Angioneurotic edema: the blood vessels of the eyes are relatively fragile, and frequent eye rubbing and other stimuli can lead to an increase in the permeability of the blood vessels inside the eyelids, resulting in fluid leakage into the tissue space under the eyelids, causing upper eyelid swelling and itching. The appearance of the upper eyelid itchy swelling, it is recommended to go to the regular hospital ophthalmology consultation in a timely manner, the treatment of diseases that cause the upper eyelid itchy swelling.