Redness at the corners of the eyes may be due to visual fatigue, conjunctivitis, dry eye and other reasons. 1. Visual fatigue: Visual fatigue caused by staying up late for a long time, using electronic products such as cell phones for a long time, and being in a dim or bright light environment for a long time can cause redness at the corners of the eyes. 2. Conjunctivitis: Bacteria, viruses and other infections lead to acute inflammatory reaction of the conjunctiva, involving the conjunctiva of the corner of the eye, can cause local vascular expansion and congestion and other inflammatory manifestations. 3. Dry eye: tear synthesis and secretion of reduced or excessive evaporation of tears, uneven distribution of tears, etc., the surface of the eye cornea, conjunctiva and other tissues lack of tears to protect the lubrication, but also the corner of the eye redness. The redness of the corners of the eyes may be related to a variety of factors, after rest does not see relief or accompanied by increased secretion and other discomforts, it is recommended to consult a doctor for examination in a timely manner.