Blockage of the lacrimal gland, or lacrimal obstruction, often occurs at the junction of the tear duct, lacrimal duct, lacrimal sac and nasolacrimal duct, as well as at the lower nasolacrimal duct. Tear duct obstruction often manifests as tear overflow, and long-term fluid immersion can easily lead to secondary eye infections, causing diseases such as dacryocystitis and lacrimal glanditis, which cause redness, swelling, and pain on the outer side of the upper lid. Long-term tear maceration can easily cause eczema, and constant wiping of tears can also easily cause eyelid ptosis. The cause of lacrimal duct obstruction is not fully understood and may be due to congenital abnormalities or acquired trauma. Such as lacrimal stones, foreign bodies, long-term chronic inflammation of the perilacrimal tissues resulting in scarring, etc. The common cause of lacrimal duct obstruction in infants and young children is due to late development during the embryonic period. After birth, the lower end of the nasolacrimal duct still has a flap that partially or completely covers the opening of the nasolacrimal duct, which opens on its own a few months after birth, and causes lacrimal overflow if it is not well developed. If secondary infection occurs, neonatal dacryocystitis is formed and mucopurulent discharge appears. Tear duct obstruction in middle-aged and elderly people is mainly caused by the relaxation of the orbicularis oculi muscle, which makes the tear pump weaken or disappear, and tear drainage is impaired, resulting in tear overflow. In daily life, if symptoms of lacrimal obstruction appear, timely treatment is needed. For patients with mild symptoms, local massage or hospital visit can be performed by professional doctors for tear duct exploration; for patients with more serious symptoms, surgical plans can be made by doctors according to the condition, such as lacrimal ductotomy, lacrimal duct lacrimal sac end-lateral anastomosis, lacrimal sac nasal anastomosis, etc.