what is a chalazion and how do you treat it
A chalazion is a small (2-8 mm) fluid-filled swelling (cyst) in the eyelid. It is common and sometimes called a meibomian cyst or tarsal cyst. A chalazion is more common on the upper eyelid. It is possible to have several at once, in more than one eyelid.
Normally chalazia will drain on their own, but a persistent chalazion requires treatment by an eye doctor. Many chalazia drain, resolving on their own, especially if you facilitate the process with periodic warm compresses and gentle massage of the eyelid.