What is the reason why your eyes always shed tears?
Tearing eyes are caused by two reasons, namely increased tear secretion and blocked excretion.
Human tears are secreted by the lacrimal gland. The main lacrimal gland is a reflex secretor. When stimulated by pain, cold, obvious changes in mood and other factors, tear secretion increases. Therefore, when stimulated by cold wind, it can reflexively cause hypersecretion of the main lacrimal gland. At the same time, the skin and muscles on the face and around the eye sockets shrink after being stimulated by cold, compressing the tear ducts, blocking the discharge of tears from the nasal cavity, and being forced to flow out from the corners of the eyes, so tears flow vertically and horizontally.
Generally speaking, under normal circumstances, this phenomenon is short-lived and will disappear soon after the body adapts.
When suffering from eye diseases such as trachoma, entropion, trichiasis, keratitis, corneal softening, uveitis, refractive error, etc., the conjunctiva will be congested and the cornea will be damaged. At this time, the eyes will be sensitive to external stimulation. The sensitivity is enhanced, and the phenomenon of crying in the wind becomes more obvious. If the nasolacrimal duct is normal and has no obstruction, then even if there is tearing in the wind, it will not be long-lasting. Only when there are tear diseases such as chronic dacryocystitis and lacrimal duct stenosis at the same time, the excessive secretion of tears cannot be discharged through the nasolacrimal duct in time, and the phenomenon of windward tearing will occur for a long time.
If tears in the wind occur, it is an obvious signal to people. They should pay attention to it and go to the hospital for examination as soon as possible to find the specific cause and receive appropriate treatment. For trachoma and acute and chronic conjunctivitis, various effective antibiotic eye drops can be instilled. Patients with corneal softening need to supplement vitamin A, including taking vitamin A and eating more foods rich in vitamin A, such as carrots, Tomatoes, spinach, animal liver, eggs, etc.
When there is refractive error, it is necessary to check vision, refraction, and wear appropriate glasses in time. As for nasolacrimal duct obstruction or narrow perforation, nasolacrimal duct irrigation or nasolacrimal duct probing is required.