The reason why patients have tears in the wind may be due to the following aspects: 1, abnormal tear duct: it may be caused by the obstruction and narrowing of the tear duct, the tear duct is located in the inner corner of the eye, which consists of the lacrimal punctum, lacrimal tubule, lacrimal duct, lacrimal sac and nasolacrimal duct, and the lacrimal glands secrete tears to moisturize the eyes, and then they are absorbed through the lacrimal duct into the nasal cavity, and then they are absorbed by the nasal mucosa, and once there is an obstruction and narrowing of the lacrimal duct, it will involve the surrounding muscle contraction and spasm when it is stimulated by the wind. Once the tear duct is blocked and narrowed, the surrounding muscles will contract and spasm when stimulated by the wind, which will further aggravate the blockage and narrowing of the tear duct, and the tears secreted by the eyes will not be able to be smoothly drained into the nasal cavity, which will lead to the occurrence of tears in the wind. 2, dry eye: the tear film on the surface of the eye has formed a protective layer, and when there is a dry eye, the protective layer of the tear film has changed, and the cold wind stimulates the cornea, and the eye’s reflexes will think that it is a foreign body, so it will reflexively shed tears. It will reflexively flow tears. 3, protective reflex: there may be a physiological protective reflex, is due to the tear glands to cold air stimulation produced by a physiological reflex.