What Are the Sinuses? Pictures of Nasal Cavities - WebMD

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The sinuses are a connected system of hollow cavities in the skull. The largest sinus cavities are about an inch across. Others are much smaller ... MenuMedicalReferenceFeaturesVideoSlideshows&ImagesQuizzesNewsArchiveNewsReferenceSlideshowsQuizzesVideosMedicationsFindanAllergistOverview&FactsSymptoms&TypesDiagnosis&TestsTreatment&CareAllergiesorCold?AllergyMapAllergyReliefAdvisorChildren'sAllergiesEyeAllergiesCold&FluMapSkinAllergiesFoodAllergiesAsthmaDrugInteractionCheckerSevereAllergiesMoreRelatedTopicsAllergiesA-ZAllergiesReferenceMenuMedicallyReviewedbySabrinaFelson, MDonJuly10,2020ImageSource©2014WebMD,LLC.Allrightsreserved.Thesinusesareaconnectedsystemofhollowcavitiesintheskull.Thelargestsinuscavitiesareaboutaninchacross.Othersaremuchsmaller.Yourcheekbonesholdyourmaxillarysinuses(thelargest).Thelow-centerofyourforeheadiswhereyourfrontalsinusesarelocated.Betweenyoureyesareyourethmoidsinuses.Inbonesbehindyournoseareyoursphenoidsinuses.They’relinedwithsoft,pinktissuecalledmucosa.Normally,thesinusesareemptyexceptforathinlayerofmucus.Theinsideofthenosehasridgescalledturbinates.Normallythesestructureshelphumidifyandfilterair.Athinwall,calledtheseptum,dividesthenose.Mostofthesinusesdrainintothenosethroughasmallchannelordrainagepathwaythatdoctorscallthe“middlemeatus.”Whydowehavesinuses?Expertsdon’tknow.Onetheoryisthattheyhelphumidifytheairwebreathein.Anotheristhattheyenhanceourvoices.SinusConditionsAcutesinusitis(sinusinfection):Viruses,bacteria,orfungiinfectthesinuscavity,causinginflammation.Moremucus;nasalcongestion;discomfortinthecheeks,forehead,oraroundtheeyes;andheadachesarecommonsymptoms.Chronicsinusitis(orchronicrhinosinusitis):Morethanjustaseriesofinfections,chronicsinusitisisapersistentprocessofinflammationofthesinuses.Deviatedseptum:Iftheseptumthatdividesthenoseistoofartoooneside,itcanobstructairflowinanostril.Hayfever(allergicrhinitis):Allergenslikepollen,dustmites,andpetdandercausethedefensesinthenoseandsinusestooverreact.Mucus,nasalstuffiness,sneezing,anditchingresult.Nasalpolypsaresmallgrowthsinthenasalcavity.Theycanhappenduetoinflammationfromasthma,chronicsinusinfections,andnasalallergies(suchashayfever).Turbinatehypertophy:Theridgesonthenasalseptumareenlarged,whichcanblockairflow.SinusTestsPhysicalexamination:Adoctorcanlookintothenosewithalightedviewertoseetheturbinates,whichmaybeswollen.Theymaypressortaponthefaceoverthesinusestocheckforpain.Computedtomography(CTscan):ACTscannerusesX-raysandacomputertocreatedetailedimagesofthesinuses.CTscanningcanhelpdiagnosechronicsinusitis.Magneticresonanceimaging(MRI):Magneticwavescreatehighlydetailedimagesofthesinuses.YoumaygetCTandMRIscans.Rhinoscopy:Doctorsuseaflexibletubewithacameraonitsendtoseeinsideyournoseandsinuses.Sinuscultures:Yourdoctorusesaneedle totakeamucussamplefrominsideyoursinuses.Skintestforallergies:Thesehelptoseeifallergiesareinvolvedinyoursinusitis.SinusX-ray:AplainX-raymayshowproblemswiththebonesaroundthesinuses.ACTscanisbetter.SinusTreatmentsAntibioticsmaybeneededtotreatbacterialsinusitis.Antihistamines:Medicinesthatcanreducethenasalandsinussymptomsfromallergicrhinitis.Decongestants:Drugsthatcausebloodvesselsintheinnernasaltissuetoconstrict.Asaresult,thereislesssinuscongestion,mucus,andpostnasaldrip.Nasalsalinespray:Saltwater(saline)nasalspraybreaksupdriedmucusandhelpstokeepthenosemoist.Nasalsteroidspray:Thesemedicationseasetissueswellingandhelppreventtheregrowthofnasalpolypsaftersinussurgery.Nasalwashes:Theyrinsemucusfromthenasalcavitiesandsinuses.Sinussurgerycanimproveorcorrectsomesinusconditions.Doctorsuseittoremovegrowthsortoopenablockage.BestTreatmentsforAllergiesInsectStingAllergiesWhattoKnowAboutAllergyShotsHowAreAllergiesDiagnosed?HowtoExerciseOutsideWhenYouHaveAllergiesAreYouAllergictoYourClothes?Sinuses(HumanAnatomy):Function,Picture,Location,DefinitionSinusitisTreatment,Diagnosis,SymptomsWhenaColdBecomesaSinusInfectionAnOverviewofSinusitisIsItSinusitisorAllergies?DoIHaveSinusitis?IsItaColdoraSinusInfection?SinusInfectionTopics12NaturalWaystoDefeatAllergiesMakethesetweakstoyourdiet,home,andlifestyle.NeedNasalAllergyRelief?Breatheeasierwiththeseproducts.5TipstoCutPetAllergiesLiveinharmonywithyourcatordog.10CommonAllergyTriggersWhichonesaffectyou?ArticleTheTruthAboutMucusArticleWhatIsPostnasalDrip?SlideshowIdentifyBugsandTheirBitesSlideshowNaturalWaystoDefeatSinusPainVideoTypesofAllergyTestsArticleAnaphylacticShock:WhatYouShouldKnowAssessmentGetPersonalizedAllergyandSinusTipsQUIZTestYourIndoorAllergySmartsWhatAreSulfaAllergies?BestTreatmentsforAllergiesEssentialItemsforAllergyReliefPetsandAllergiesGetYourAllergiesUnderControlAreYouAllergictoYourJob?HealthSolutionsPenisCurvedWhenErect?CouldIhaveCAD?TreatBentFingersTreatHR+,HER2-MBCTiredofDandruff?BenefitsofCBDRethinkMSTreatmentAFib-RelatedStrokesRiskofaFutureDVT/PEIsMyPenisNormal?RelapsingMSOptionsLiverTransplantsSaveLivesFinancePlasticSurgeryBentFingerCausesLivingWithPsoriasis?MissingTeeth?MorefromWebMD5TipstoHelpWithRelapsingMSHowtoThriveWithNarcolepsyReliefforBlockedHairFolliclesPsoriaticArthritisandYourSleepWhatPsoriasisFeelsLikeFirstPsoriaticArthritisFlareTalkingtoYourDoctorAboutRACrohn's:A'Full-Body'DiseaseAvoidingCrohn’sFlaresHealthBenefitsofHempSeedOilLiveBetterWithPsoriaticDiseaseTypesofB-CellTherapyforMS5HealthBenefitsofHempWhyProstateCancerSpreadsLivingwithAdvancedBreastCancerWhereBreastCancerSpreads

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