The cause of the patient’s tears in the wind, there may be the following aspects: 1, tear duct abnormalities: may be due to tear duct obstruction, tear duct narrowing caused by the tear duct is located in the inner corner of the eye, by the tear dots, tear ducts, tear ducts, tear sacs and nasolacrimal ducts together, when the tear glands secrete tears to moisten the eyes, through the tear ducts absorbed into the nasal cavity, absorbed by the nasal mucosa, once the tear ducts have obstruction, narrowing, in the wind The tear ducts will be stimulated by the contraction and spasm of the surrounding muscles, which further aggravates the obstruction and narrowing of the tear ducts, and the tears secreted by the eyes cannot be smoothly drained to the nasal cavity, thus the situation of windy tears occurs. 2, dry eye: the tear film forms a protective layer on the surface of the eye, when there is dry eye, the protective layer of the tear film changes, and the cold wind stimulates the cornea, the reflex of the eye thinks it is entering a foreign body, so 3, protective reflex: there may be a physiological protective reflex, which is a physiological reflex due to the tear glands to cold air stimulation.