Itchy redness and swelling at the corners of the eyes may be related to blepharitis, foreign bodies, contact blepharitis and so on. 1. Blepharitis: mostly due to staphylococcus aureus infection caused by sebaceous gland edema, etc. If the infected area is near the corner of the eye, redness, swelling or itching at the corner of the eye may occur. 2. Foreign body: When there is a foreign body, such as soft hair, staying in the corner of the eye, it may cause itchiness, and redness and swelling may also occur if you rub your eyes excessively. 3. Contact blepharitis: When allergic substances such as pollen or poor quality cosmetics come into contact with the corners of the eyes, they may cause a localized allergic reaction at the corners of the eyes, showing symptoms of itching, redness and swelling. Itchy redness and swelling of the corners of the eyes due to a variety of reasons, it is recommended to consult a doctor in a timely manner, in accordance with the doctor’s instructions and then further relevant examinations, with the help of the doctor to clarify the causes, and targeted treatment or treatment.