Chronic dacryocystitis is a common disease, except for a few infants and children due to congenital abnormal development of the nasolacrimal ducts, and most often occurs in middle-aged and older women. Due to the inflammation of the conjunctiva or the nasal cavity and sinuses, the lower end of the nasolacrimal duct is narrowed or obstructed, and tears and bacteria are retained in the lacrimal sac, stimulating the lacrimal sac wall and forming inflammation. Patients with lacrimation, aggravated by wind, blurred vision, a small amount of secretion from the inner contiguous angle, in case of poor body resistance, causes acute inflammatory episodes, manifested as redness, swelling, pain and fever of the skin of the inner contiguous part. In addition to tear overflow, the conjunctiva is often congested. When the tear sac is compressed, mucopurulent secretions are sometimes seen to overflow from the tear dots. When lacrimal flushing is performed, flushing fluid and secretions can be seen to return from the lacrimal dots. 1, chronic dacryocystitis long-term flow of purulent or mucus secretions, the skin of the tear sac area can be dirty color, there can be a history of acute attacks, flushing the tear duct can be seen flushing fluid and secretions from the tear dots reflux. 2, lacrimal duct stenosis with severe lacrimal symptoms but no obvious purulent and mucus secretions, but co-infection can also cause dacryocystitis, flushing the lacrimal duct can be identified, no yellow purulent or white mucus secretions from the lacrimal puncta, visible flushing fluid outflow, upflushing upward, downflushing downward is the common lacrimal duct stenosis or upper and lower lacrimal ducts are narrow, upflushing upward, downflushing usually is the upper lacrimal duct stenosis, downflushing downward is the reverse If the lacrimal ducts are normally upstroked, then the lower lacrimal ducts are narrowed. Chronic inflammation of the conjunctiva or cornea also causes tearing and discharge from the eyes, which can be identified by flushing the tear ducts. The current treatment of lacrimal sacculitis is to re-establish the lacrimal drainage pathway as the main principle, according to the length of the onset, local pathological changes in the characteristics of the corresponding treatment methods, specifically the following: 1, lacrimal duct irrigation: purpose: applicable to the different periods of lacrimal sacculitis, the main purpose is to remove the retention of the sac, and then the application of sensitive antibiotic solution, to achieve the purpose of local anti-inflammatory, decongestion, for Some cases with short onset, no obvious adhesions and hyperplastic obstruction of the nasolacrimal duct mucosa, have a chance to be cured, while for all kinds of serious dacryocystitis can be prepared for further treatment. 2.Lacrimal duct probing: After 3-5 times of lacrimal duct flushing is still not pass, and the course of the disease is long, suspected nasolacrimal duct mucous membrane hyperplasia or lumen with mucus obstruction, you can use a group of special lacrimal duct probing needle of different thicknesses for lacrimal duct probing, this procedure on the one hand to cause the role of mechanical unblocking lacrimal duct, and at the same time in the process of operation can understand the obstruction site, the degree of obstruction, to provide a reference basis for the next step of treatment. 3.Lacrimal implant: 4.Laser lacrimal duct unblocking 5.Nasal lacrimal sac anastomosis: Through the surgical way, re-establishing a drainage pathway between the lacrimal sac and the nasal cavity is the most reliable treatment method, but it is somewhat limited because of the fatty scar of the wound left on the face. In recent years, with the development of sinus endoscopy technology, nasal lacrimal sac anastomosis is now done in the nasal cavity, i.e. nasal lacrimal sac anastomosis, which does not leave facial incision scar, with precise efficacy and very good long-term results. Since the lacrimal sac is anatomically separated from the nasal cavity by only two layers, namely the nasal mucosa and the bony lacrimal fossa, and the projection of the lacrimal sac on the lateral wall of the nasal cavity is located in the anterior part of the middle nasal canal, transnasal lacrimal sac osteotomy is simpler, easier and safer than the traditional percutaneous surgery, and the procedure is performed under direct intranasal vision using nasal endoscopic techniques. The procedure avoids the disadvantages of percutaneous surgery by damaging the adjacent blood vessels and ligaments, has no facial paralysis, and has few complications. I have performed a large number of these procedures.