A stye, also known as a hordeolum, is a bacterial infection of an oil gland in the eyelid. ... This results in a red tender bump at the edge of the eyelid. ... The outside or ...StyeFromWikipedia,thefreeencyclopediaJumptonavigationJumptosearchThisarticleisabouttheswellingofaneyelid.Forthearticleofapenwithpigs,seeSty.ForotherusesofSty,seeSty(disambiguation).MedicalconditionStyeOthernamesSty,hordeolum[1]AnexternalstyeontheuppereyelidPronunciationStye/staɪ/,hordeolum/hɔːrˈdiːələm/SpecialtyOphthalmology,optometrySymptomsRedtenderbumpattheedgeoftheeyelid[1]UsualonsetAnyage[2]DurationFewdaysorweeks[3]CausesUsuallybacterialinfectionbyStaphylococcusaureus[3]DifferentialdiagnosisChalazion[4]TreatmentWarmcompresses,antibioticeyeointment[5][6]Astye,alsoknownasahordeolum,isabacterialinfectionofanoilglandintheeyelid.[4]Thisresultsinaredtenderbumpattheedgeoftheeyelid.[1][5]Theoutsideortheinsideoftheeyelidcanbeaffected.[3]ThecauseofastyeisusuallyabacterialinfectionbyStaphylococcusaureus.[3][6]TheinternalonesareduetoinfectionofthemeibomianglandwhiletheexternalonesareduetoaninfectionoftheglandofZeis.[5]Achalazionontheotherhandisablockedoilglandwithoutinfection.[4]Achalazionistypicallyinthemiddleoftheeyelidandnotpainful.[5]Oftenastyewillgoawaywithoutanyspecifictreatmentinafewdaysorweeks.[3]Recommendationstospeedimprovementincludewarmcompresses.[5]Occasionallyantibioticeyeointmentmayberecommended.[6]Whilethesemeasuresareoftenrecommended,thereislittleevidenceforuseininternalstyes.[3]Thefrequencyatwhichstyesoccurisunclear,thoughtheymayoccuratanyage.[2]Contents1Signsandsymptoms1.1Complications2Cause3Prevention4Treatment4.1Antibiotics4.2Procedures4.3Alternativemedicine5Prognosis6Etymology7Seealso8References9ExternallinksSignsandsymptoms[edit]Styeoftheuppereyelid8-year-oldboywithanexternalhordeolumoflowerlidThefirstsignofastyeisasmall,yellowishspotatthecenterofthebumpthatdevelopsaspusandexpandsinthearea.[7]Otherstyesymptomsmayinclude:AlumponthetoporbottomeyelidLocalizedswellingoftheeyelidL