Pulling a white line out of the corner of the eye may be related to eye fatigue, or it may be due to dry eye, conjunctivitis, dacryocystitis and other causes. 1. Eye fatigue: If in the near future, a long time close to writing, watching cell phones, computers, tablets and other electronic products, or a long time too late at night, easy to cause eye fatigue, it may lead to increased eye secretions, which will show the corner of the corner of the eye pull out a white line. 2. Dry eye: usually due to prolonged exposure to wind and sunlight, or long stay in the environment caused by smoke, can lead to dry eyes, resulting in increased eye secretions, may show a white line at the corners of the eyes, but also accompanied by eye itching, tearing and other symptoms. 3. Conjunctivitis: usually caused by bacterial, viral and other pathogenic bacteria infections, due to inflammation stimulation, can cause the conjunctival secretion increase, and the secretion viscous strong, resulting in the corner of the eye pull out a white line, can also be accompanied by eye itching, eye pain and other symptoms. 4. Dacryocystitis: usually because of the narrowing or blockage of the nasolacrimal duct, resulting in tear retention, the formation of the tear sac mucous membrane stimulation, resulting in inflammatory reaction of the tear sac, the stimulation of inflammatory products, resulting in increased ocular secretions, which may lead to the corner of the eye pull out a white line. A white line out of the corner of the eye, if accompanied by other obvious symptoms of discomfort, you should seek medical attention as soon as possible, for targeted treatment.