Dacryocystitis is an infection in the tear ducts of the eye or in the tear sac, also called the lacrimal sac.
At the inner corner of each upper and lower eyelid is an opening to a small tube or tear duct. Tear ducts carry away tears that have rinsed the front surface of the eye away so fresh tears can come in. Your tears are made by a small organ above the eye under the upper lid. Your lacrimal sac is connected by a tube to each tear duct, and to the inside of your nose. Tears spill out of the eyes and into the back of your nose when you cry, although the tears entering the nose are not visible.
A tear duct can get infected if it becomes blocked and bacteria collect in the ducts or the lacrimal sac. A blockage near the nose also can cause excessive tearing from the eye.
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