Stye.

Abstract

The medical name for a stye is hordeolum (or hordeola if there are more than one). Styes are a very common type of infection of the eyelid. They usually develop quite quickly, over a few days. Usually only one eye is affected, although you can develop more than one stye at a time, even on the same lid. There are two types of stye: external styes (the common type) and internal styes (which are quite uncommon).