There are many different causes of itchy corners of the eyes and a variety of causes. What exactly is going on with itchy corners of the eyes needs to be determined in the hospital. Itchy corners of the eyes may be caused by the following diseases: first, blepharitis, which can be divided into scaly blepharitis, ulcerative blepharitis, canthal blepharitis, and mite blepharitis, which can appear with itchy corners of the eyes and rough, flaky skin; second, local allergic or contact dermatitis of the skin at the corners of the eyes, which can appear with red and itchy skin at the corners of the eyes; third, conjunctivitis, especially allergic conjunctivitis, spring conjunctivitis, giant papillary conjunctivitis, and viral conjunctivitis, etc., which can present with itchy corners of the eyes and conjunctival congestion; fourth, as a result of diseases caused by wearing contact lenses and other corneal contact lenses; fifth, dry eyes, which can present with itchy corners of the eyes and dry eyes; and sixth, eye fatigue, especially visual fatigue, which can also present with itchy corners of the eyes and eye swelling. It is because there are many kinds of diseases that can lead to itchy corners of the eyes, the specific cause may sometimes be difficult to determine, which requires a visit to the hospital for further examination to identify the cause and treat the symptoms.