Acute PainPainPain MeasurementPain ManagementPain, PostoperativePain ClinicsPain ThresholdChronic PainAnalgesicsAnalgesics, OpioidAnalgesiaPain, IntractablePain PerceptionBack PainLow Back PainFacial PainAnesthesia Department, HospitalHyperalgesiaAcute DiseaseNeuralgiaAbdominal PainNeck PainAnalgesics, Non-NarcoticAnalgesia, Patient-ControlledRelief WorkPelvic PainMorphineNociceptorsUnited States Department of DefensePain, ReferredAnesthetics, LocalChronic DiseaseToothacheRecovery RoomShoulder PainTreatment OutcomeAcupunctureAnalgesia, EpiduralInjections, SpinalKetoprofenAnti-Inflammatory Agents, Non-SteroidalMusculoskeletal PainDiclofenacDouble-Blind MethodCyclohexanecarboxylic AcidsHot TemperatureKetorolacCryingNerve BlockAcetaminophenTranscutaneous Electric Nerve StimulationLidocaineKetamineNarcotic AntagonistsFormaldehydeSkin Physiological PhenomenaAnesthesiologyGanglia, SpinalBuprenorphineNociceptive PainPeripheral Nervous System DiseasesSpinal CordCapsaicinBehavior, AnimalQuestionnairesHerpes ZosterProspective StudiesDexmedetomidineAnesthetics, DissociativeTime FactorsLabor PainAnemia, Sickle CellAminesCarrageenanInfant BehaviorCold TemperatureRats, Sprague-DawleyPosterior Horn CellsComplex Regional Pain SyndromesSeverity of Illness IndexPhysical StimulationArthralgiaMyofascial Pain SyndromesNaloxoneDose-Response Relationship, DrugInflammationDisease Models, AnimalTRPV Cation ChannelsVisceral PainReceptors, Opioid, muPatient SatisfactionEmergency Service, HospitalHydrocortisoneWounds and InjuriesTrigeminal NeuralgiaAnalysis of VarianceBupivacaineHong KongPalliative CareMagnetic Resonance Imaging