01 · What it is
What is a stye?
Hordeolum · 麦粒肿
A stye (hordeolum) is a painful reddish lump on the eyelid edge. Like a blocked pore, it forms when a tiny oil gland near the lashes clogs and infects. Styes are common in men and women, and they show more often in adults than in children.
| Type | Where it sits | Usual gland |
|---|---|---|
| External styeMore common. | Base of the eyelash, on the outer eyelid | Infection in the eyelash follicle |
| Internal styeOn the inner lid. | Inner eyelid surface | Infection in the oil gland that keeps the lid moist |
A firmer, less tender lump that lasts weeks is more often a chalazion: a blocked oil gland without the same acute infection.