Lacrimal stenosis is a disease in which the lacrimal duct is not open for various reasons, resulting in symptoms such as tearing caused by the inability of tears to be discharged smoothly. Lacrimal stenosis is closely related to congenital developmental abnormalities, chronic inflammation, trauma, foreign bodies, tumors, etc. It is mainly due to the thickening of the mucous membrane of the lacrimal duct itself or the pressure on the lacrimal duct, etc. The patient will have limited tear drainage, which leads to the eyeball being soaked with tears for a long time, and can irritate the eyelid surrounding causing itching and other symptoms of eye discomfort. Patients can undergo clinical examination, lacrimal imaging, nasal endoscopy, and dacryoscopy to assess the specific condition, and can be treated with surgical procedures such as lacrimal dilatation. It is recommended that patients with tear duct stenosis who are experiencing discomfort seek prompt medical attention to evaluate their condition and follow the doctor’s instructions for treatment.