Itchy cornea may be caused by allergic conjunctivitis, keratitis, dry eye and so on. 1. Allergic conjunctivitis: it is usually caused by the patient’s exposure to allergens, such as pollen and feathers, etc. It may be caused by symptoms such as photophobia, foreign body sensation in the eyes, and tearing, which leads to itchy cornea. 2. Keratitis: it may be caused by bacterial infection or low immunity, etc. Symptoms such as eye pain, vision loss, and increased purulent secretion may occur, and the increased secretion may irritate the eyes, thus leading to itchy cornea. 3. Dry eye: generally due to insufficient secretion of tear fluid from the lacrimal gland or lack of sleep, etc., dry eyes, photophobia, tearing and other symptoms may occur, usually also cause corneal itching. The appearance of corneal itching, it is recommended that patients promptly go to the hospital for examination and treatment, while paying attention to eye hygiene.