An external eyelid stye is a red, painful bump on the surface of the eyelid. Learn about external eyelid stye symptoms, causes, treatment, and prevention.

External styes occur in the glands of Zeis or Moll, ... There are also internal hordeola, which show up as slightly deeper and often more painful localized inflammation of the lids, ...

— An external stye starts at the eyelash base. — An internal stye occurs inside your eyelid. The technical term for a stye is hordeolum. If a stye has been there for a while, ...

Hordeola are either external (often referred to as styes) or internal. External hordeola are characterized by obvious lid lesions with localized pain, warmth, and redness (Figure 1) and result ...