What is dacrocystitis? what cures it?

Lacrimal infection: The tears drain into the lacrimal sac, which is just under the skin at the inside corner of the eyes. Small tubes called canaliculi drain from small openings in the eyelid into this sac. From here, tears drain into the nasal cavity. If an infection occurs in the lacrimal sac it is called dacryocystitis. There is pain, swelling, tearing, and redness at the inside corner. Oral antibiotics treat it.