What is chronic dacryocystitis: The human eye has a tear drainage channel, if the nasolacrimal duct or the lower part of the tear sac is blocked due to inflammation, trauma, foreign bodies, tumors, etc., secretions are retained in the tear sac and bacteria breed and cause infection, this is also known as chronic dacryocystitis. Chronic dacryocystitis usually does not have symptoms such as local pain and skin redness, but mainly manifests as frequent tearing in the inner corner of the eye, tears with pus, and a large amount of yellowish-white pus can be seen flowing out from the corner of the eye when you press the tear sac area with your finger. Chronic lacrimal sac disease: The pus of the tear sac contains a large number of bacteria, which can cause damage to the eye at any time and can lead to keratitis or corneal ulcers, and in severe cases, corneal perforation and blindness. Chronic dacryocystitis can also be acute, causing inflammation of the tissues around the dacryocyst, resulting in local skin redness and pain, and if the dacryocyst abscess breaks through the skin, a “dacryocystic fistula” will form, which is difficult to cure because of the long-term flow of pus. So ophthalmologists often compare chronic dacryocystitis to a “time bomb” next to the eye. The chronic dacryocystitis, how to treat: Chronic dacryocystitis is not obvious with medication alone, so surgery is one of the most effective ways to cure the disease. The traditional procedure is the external nasal tear sac nasal anastomosis, which is traumatic, bleeds easily, and leaves a scar that affects the beauty of the wound, which is especially difficult for young patients to accept. In recent years, our ophthalmology department has pioneered the development of tear duct iodophoresis and nasal endoscopic lacrimal sac nasal anastomosis, providing a new surgical route for this disease. Its main advantages: 1, no scar on the face. 2.The position, size and opening of the bone hole are observed under direct vision of nasal endoscopy, and the cure rate is high. 3.Minimally invasive The damage to the lacrimal sac is small and the “power pump” function of the lacrimal sac is preserved, so that the tears are discharged in an almost physiological way. 4.It can deal with nasal diseases at the same time, and remove the cause to increase the success rate of surgery. At present, transnasal minimally invasive surgery is the treatment of choice for chronic dacryocystitis.