A stye is a small, painful lump (cyst) on the inside or outside of the eyelid.

As styes are usually caused by a bacterial infection, doctors sometimes refer to them as infected eyelid cysts.

The medical name for a stye is a hordeolum.

Styes usually affect one eye, but it's possible to get them in both eyes or to have more than one stye in the same eye. Your vision shouldn't be affected.

This topic covers:


Types of stye

What causes a stye?

Treating a stye

When to see your GP

Complications of a stye

Content supplied by the NHS Website

Medically Reviewed by a doctor on 28 Nov 2016