Spring is here and the wind and sand are starting to rise in many places. The number of people coming to the eye clinic with tears in the wind is increasing. Careful patients will find that women are more common among those who come to see the doctor because of tears in the wind, and in most cases, the ratio of men to women is one to two, sometimes even as high as one to four. So, why does wind-flowing tears favor women? It turns out that the main reason for wind-driven tears is the blockage or narrowing of the tear duct, which is a system of ducts located between the corner of the large eye and the nasal cavity, and its function is to drain the tears, that is, after the tears are secreted by the lacrimal gland and the paracrine gland, the drainage through the tear duct finally reaches the nasal cavity. In a normal person in a waking and calm state, adults have 0.5 to 1.0 ml of tears every 16 hours, these tears in addition to wetting the eyeball and part of the evaporation, the remaining tears are drained by the tear duct into the nasal cavity, in the absence of stimulation, the secretion and elimination of tears is balanced. When the tear gland is stimulated by sand, reflexively cause tear secretion increases, and the tear duct is stimulated by sand reflexively contracted, the lumen becomes smaller, a moment can not drain out too many tears, so the phenomenon of tears, this situation is medically known as “tear overflow”. Chengde Medical College Hospital Ophthalmology Wang Haibin Tear duct obstruction in people, women are significantly higher than men, and mainly in middle-aged and elderly women, the reasons are not completely clear, but most of the relevant factors have been clarified, research shows that may be related to the following factors ① male and female facial bone anatomy differences, women’s bony nasal tear duct is relatively narrow; ② women cry more tears, if you wipe your eyes with contaminated hands and objects ② women cry more tears, if you wipe your eyes with contaminated hands and objects, it can cause tear pollution, contaminated tears are retained in the tear duct and secondary infection ③ women have relatively more exposure to fumes, dust, cosmetics and other irritants; ④ tear duct obstruction is mostly seen in middle-aged and elderly women, may be related to female physiological characteristics, middle-aged and elderly female heart estrogen reduction, tear duct mucosa will dry, keratinization, coupled with tear duct narrowing part of the epithelial debris accumulation and lead to tear duct obstruction. The occasional small amount of tears in the cold wind can be a normal physiological phenomenon, but the amount of tears after the wind is more, even in the indoor resting state also tears, it is a pathological situation. Generally, there are two cases, one is due to inflammation, trauma, polyps, etc. caused by the narrowing of the tear ducts or tear ducts and secretions blocking the tear ducts, resulting in incomplete obstruction of the tear ducts and reduced tear drainage function; the other case is complete obstruction of a part of the tear ducts, such as trauma, tumors, physical and chemical factors, inflammation of the tissues near the tear ducts (such as chronic rhinitis), chronic dacryocystitis, congenital malformations and tear ducts tumors, etc. If the tear duct obstruction site in the lower part of the tear sac or nasolacrimal duct, tear drainage is not smooth, a large number of tears accumulate in the tear sac, because its temperature and humidity is very suitable for bacterial growth and reproduction, over time, will cause a large number of bacteria breeding and pus, and the symptoms of pus flowing from the corner of the eyes, medically known as “overflow pus”. If it is the latter two causes of tears in the wind, especially when the symptoms of “overflowing pus” have appeared, you need to go to the hospital for examination and treatment as soon as possible. For the treatment of tearing and pus overflow caused by tear duct obstruction and dacryocystitis, in the past, a 2cm long surgical incision is usually made on the patient’s face and a hole the size of a penny is cut in the nasal bone, which is not only traumatic but also leaves scars on the face and affects beauty, which makes many patients, especially female patients, daunted. The most advanced treatment method for tear duct obstruction is laser treatment under lacrimal endoscope, which is a new ophthalmology technology emerging in recent years, under the guidance of lacrimal endoscope, accurately open the tear duct obstruction site with laser or open another drainage channel into the nasal cavity, serious cases can be left in the tear duct stent tube to promote tear duct shaping, restore patency, to achieve the purpose of treatment. Compared with laser treatment without lacrimal speculum guidance in previous years, it has the advantages of direct vision and accuracy, less trauma, faster recovery, higher success rate, and no scarring, etc., which is much preferred by patients (especially female patients).