Tears and pus in the corners of the eyes Lachrymation is a group of disorders in which the tear ducts are not functioning properly, leading to poor tear elimination and spillage from the corners of the eyes. If accompanied by bacterial infection, there will also be pus overflow from the corner of the eye. Although the disease is not life-threatening and does not lead to blindness, the persistence of the symptoms is often disturbed by the patient’s normal life. Lacrimal Disease Under normal circumstances, the tear duct should be close to the eyeball, facing the lake of tears, and then through the siphoning effect of the tear duct on the tears, the tears can enter the tear duct, and then flow into the nasal cavity, and if there is a problem with any part of this channel, lacrimal disease will occur. Physician comment, the tears flow into the nasal cavity is not powered, basically rely on the eyelid muscles and tear sac wall muscle movement, the tears from the corner of the eye suction into the nasal cavity, when the orbicularis oculi muscle paralysis, flaccid, or tear sac scar contracture atonic, are to reduce the siphon effect of the lacrimal canal, the function of the discharge of tears is reduced; for example, the lower blepharodermatitis, localized swelling, conjunctival laxity, or the tear caruncle hypertrophy, the lower eyelid scar or spasms caused by blepharopharyngia The most common cause is long-term facial nerve anesthesia, which can lead to the formation of functional tears. The most common is patients with long-term facial nerve palsy, often combined with tear overflow. In this case, the patient went to the hospital to do the tear duct flushing is fluent. The next factor is the narrowing of the tear duct or obstruction of the nasal cavity: human tears come from the lacrimal gland, which consists of fine tubular glands and ducts, and it is the organ that secretes tears. After tears are produced, they are discharged through the tear ducts. Tear duct abnormalities or tear duct abnormalities such as tear duct ectropion, stenosis, occlusion or absence of tear duct, tears can not flow into the tear duct, tear duct developmental abnormalities (congenital atresia), trauma, foreign bodies, inflammation, tumors, scarring contraction, and all types of rhinitis, nasal mucosal congestion and swelling or turbinate hypertrophy and hyperplasia, nasal polyps and other neoplastic organisms can be directly blocked the lower opening of the nasolacrimal duct, can lead to tear spillage. These conditions, when doing tear duct flushing, suggest different areas of tear duct obstruction. Finally, there is a specific condition of overflow of thick tears that is often indicative of chronic dacryocystitis and lacrimal canaliculitis. Chronic dacryocystitis is a common external ophthalmologic disease, the pus in the lacrimal sac in a variety of bacterial species, virulence, from the lacrimal secretion of the bacteria cultured pneumococcus, streptococcus, staphylococcus, and sometimes there are anaerobic bacteria, so the ordinary antimicrobial drugs are often difficult to work, the treatment cycle is long, the effect is poor, the patient often loses the confidence in the treatment, that there is no good way to take no notice. In fact, the bacteria in the lacrimal sac is the largest bacterial reservoir of the eye, bacteria can be infected from the lacrimal sac of the eye at any time, causing irreparable damage. If the cornea or conjunctiva after trauma, hidden in the lacrimal sac of bacteria will take advantage of the situation, causing keratitis or corneal ulcers, the light after the healing of the scar, and even corneal perforation and blindness. In addition, chronic dacryocystitis is also a hidden danger in ophthalmology internal eye surgery, such as cataract, glaucoma surgery, such as dacryocystitis exists, bacteria can be caused through the incision of intraocular infection (endophthalmitis) and lead to blindness. Ophthalmologists make flushing the tear ducts a routine examination before internal eye surgery. If chronic dacryocystitis is present, it should be treated before any other surgery is performed. Chronic dacryocystitis is not always stable, sometimes it can be acute, causing inflammation of the tissues around the lacrimal sac, local redness, swelling, heat, pain, and even generalized fever, while inflammation of the lacrimal canaliculus is often overlooked by patients because of its insidious condition, and the usual symptom is a lot of secretion, which is commonly seen in the lower lacrimal canaliculus, and is mostly due to the blockage of the lower lacrimal canaliculus by stones. Therefore, chronic dacryocystitis and inflammation of lacrimal canaliculus are just like a latent Therefore, chronic dacryocystitis and inflammation of the lacrimal duct are like time bombs lurking around the eyes and need to be treated actively.