What is a hordeolum (stye)?

Updated: Oct 08, 2019
  • Author: Michael J Bessette, MD, FACEP; Chief Editor: Gil Z Shlamovitz, MD, FACEP  more...
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Answer

A hordeolum (ie, stye) is a localized infection or inflammation of the eyelid margin involving hair follicles of the eyelashes (ie, external hordeolum) or meibomian glands (ie, internal hordeolum).

A hordeolum usually is painful, erythematous, and localized. It may produce edema of the entire lid. Purulent material exudes from the eyelash line in external hordeola, while internal hordeola suppurate on the conjunctival surface of eyelid.

A chalazion is a painless granuloma of the meibomian glands. The two entities may be distinguished based on the presence or absence of pain. The remainder of this article focuses on hordeolum.


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