Chalazion: A chalazion is a small bump in the eyelid caused by a blockage of the inner eyelid oil gland. It is caused by a blocked duct in one of the meibomian glands. These glands are located in the eyelid (oil gland) directly behind the eyelashes that produce a thin, oily fluid that lubricates the eye. If it bothers you, and ophthalmologist can remove it with surgery.
Answered 9/21/2017
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