Although not sentimental, Mr. Zhang, who is nearly 40 years old, has suffered from chronic dacryocystitis in recent years. He was diagnosed with chronic dacryocystitis and nasolacrimal duct obstruction. Because he suffers from severe rhinitis at the same time, his left eye often tears every day. When he gently presses the junction of the big corner of his eye and the bridge of his nose with his fingertips, yellow and white pus will flow out of the corner of his eye and go to the hospital to see an ophthalmologist. The doctor said he would do dacryocystorhinostomy, but it would probably leave a scar on his face. He didn't want to undergo this operation. So what can be done to solve this ailment? Ouyang Shunlin, director of the Otolaryngology Department of the Third Affiliated Hospital of Guangzhou Medical College, said that chronic dacryocystitis is one of the common diseases in ophthalmology. Caused by obstruction or stenosis of nasolacrimal duct, patients often have symptoms such as tears, pus, eye swelling and pain. This disease doesn't seem to be a serious illness, but it has great hidden dangers. Because the pus filled in the lacrimal sac contains a lot of bacteria, the bacteria flow out with the pus and pollute the eyeball, which can cause irreparable dangerous consequences. For example, it may lead to keratitis or corneal ulcer, even corneal perforation and blindness. "Generally speaking, the effect of simple drugs on chronic dacryocystitis is not obvious, because as long as lacrimal duct obstruction is not ruled out, inflammation may recur at any time. Therefore, surgery is the most effective way to cure the disease. " Ouyang Shunlin said that the traditional surgical method is that ophthalmologists cut the skin through the side nose and perform dacryocystorhinostomy. However, this kind of operation is cut into the deep part of the nasal cavity from the face, which is traumatic, the doctor's vision is narrow, it is difficult to look straight, the operation is very difficult, and there will be obvious scars on the face, which has a great impact on the beauty of patients. Small lacrimal sac is not effective. In recent years, with the development of endoscopic technology, minimally invasive treatment of chronic dacryocystitis through nose, that is, nasolacrimal sac anastomosis under nasal endoscope, should be the first choice for the treatment of chronic dacryocystitis.