Hordeolum is a medical term used for a common skin condition that causes the formation of a small, red and painful bump on the edge of the eyelid. While the word hordeolum is commonly used by healthcare professionals, there are several synonyms that are used by patients and non-medical individuals. Some of the synonyms for hordeolum include eye stye, sty, eyelid boil, eyelid bump, and hordeola. These synonyms are used interchangeably by people to describe the same condition. Regardless of the term used, hordeolum can be easily treated with warm compresses, antibiotics, and occasionally, minor surgical drainage.