A stye is a painful red bump along or under the eyelid. Styes can cause tearing, eyelid pain, and eyelid swelling, but usually get better with simple home treatment.



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What causes a stye? A stye (also called a "sty" or "hordeolum") is caused by inflammation and infection of a small oil gland or an eyelash follicle under or along the edge of the upper or lower eyelid.
How is a stye treated? A stye usually gets better on its own. If it doesn't improve in 1–2 weeks, a health care provider might need to drain the pus or fluid from the stye.