What Is External Hordeolum

A hordeolum (ie, stye) is a localized infection or inflammation of the eyelid

What causes external hordeolum?

The infection is most often caused by Staphylococcus bacteria. These bacteria usually live around the surface of the eyelid without causing any harm. However, when a gland becomes clogged with dead skin cells or old oil, these bacteria can become trapped in the gland and cause an infection.

What is the difference between a stye and a hordeolum?

A stye is an infection that causes a tender red lump on the eyelid. Most styes occur along the edge of the eyelid. When a stye occurs inside the eyelid, it is called an internal hordeolum (say “hor-dee-OH-lum”). A chalazion (say “kuh-LAY-zee-on”) is a lump in the eyelid.