For the causes of itchy, red and swollen corners of the eyes, the specific reasons are as follows: first, wheals: also known as the lid gland, is the root of the eyelashes, the accessory glands, follicular glands and other bacterial infection, generally to Staphylococcus aureus infection is common, causing a lid gland inflammation, also known as wheals, is an acute inflammatory lesion, manifested as itchy, red and swollen corners of the eyes, the need to give timely antibiotic eye drops, eye ointment for local treatment It can be treated locally with hot compresses to promote abscess formation, and later with incision and drainage. Second, blepharitis of the canthus: there are more causes, manifesting as flaking of the lid margin and increased secretions, which can be treated by considering supplementing with appropriate vitamins and applying local ointments. Third, allergy: allergic reaction to cosmetics, pollen and other allergens, manifesting as itching, redness and swelling in the corner of the eye. Timely detachment from the allergen and use of some anti-allergic eye drops, eye ointment or oral anti-allergy medication can have a good therapeutic effect.