Anaphylaxis is a serious allergic reaction that is rapid in onset and may cause death. It typically causes more than one of the following: an itchy rash, ...AnaphylaxisFromWikipedia,thefreeencyclopediaJumptonavigationJumptosearchLife-threateningallergicreactionMedicalconditionAnaphylaxisOthernamesAnaphylactoid,anaphylacticshockAngioedemaofthefacesuchthattheboycannotopenhiseyes.Thisreactionwascausedbyanallergenexposure.SpecialtyAllergyandimmunologySymptomsItchyrash,throatswelling,shortnessofbreath,lightheadedness,[1]UsualonsetOverminutestohours[1]CausesInsectbites,foods,medications[1]DiagnosticmethodBasedonsymptoms[2]DifferentialdiagnosisAllergicreaction,angioedema,asthmaexacerbation,carcinoidsyndrome[2]TreatmentEpinephrine,intravenousfluids[1]Frequency0.05–2%[3]Anaphylaxisisaseriousallergicreactionthatisrapidinonsetandmaycausedeath.[4][5]Ittypicallycausesmorethanoneofthefollowing:anitchyrash,throatortongueswelling,shortnessofbreath,vomiting,lightheadedness,lowbloodpressure.[1]Thesesymptomstypicallycomeonoverminutestohours.[1]Commoncausesincludeinsectbitesandstings,foods,andmedications.[1]Othercausesincludelatexexposureandexercise;casesmayalsooccurwithoutanobviousreason.[1]Themechanisminvolvesthereleaseofmediators[clarificationneeded]fromcertaintypesofwhitebloodcellstriggeredbyeitherimmunologicornon-immunologicmechanisms.[6]Diagnosisisbasedonthepresentingsymptomsandsignsafterexposuretoapotentialallergen.[1]Theprimarytreatmentofanaphylaxisisepinephrineinjectionintoamuscle,intravenousfluids,thenplacingtheperson"inarecliningpositionwithfeetelevatedtohelprestorenormalbloodflow".[1][7]Additionaldosesofepinephrinemayberequired.[1]Othermeasures,suchasantihistaminesandsteroids,arecomplementary.[1]Carryinganepinephrineautoinjectorandidentificationregardingtheconditionisrecommendedinpeoplewithahistoryofanaphylaxis.[1]Worldwide,0.05–2%ofthepopulationisestimatedtoexperienceanaphylaxisatsomepointinlife.[3]Ratesappeartobeincreasing.[when?][needsupdate][3]Itoccursmostofteninyoungpe