Chronic PainPainPain ManagementPain MeasurementPain, IntractablePain ThresholdChronic DiseasePain, PostoperativePain PerceptionBack PainAcute PainLow Back PainAnalgesics, OpioidNeck PainAnalgesicsNeuralgiaPain ClinicsAbdominal PainFacial PainPelvic PainMusculoskeletal PainHyperalgesiaShoulder PainFibromyalgiaPain, ReferredAnalgesiaOpioid-Related DisordersNociceptorsNociceptive PainComplex Regional Pain SyndromesQuestionnairesArthralgiaMyofascial Pain SyndromesOxycodoneCentral Nervous System SensitizationDisability EvaluationTemporomandibular Joint DisordersNociceptionTreatment OutcomeInjections, SpinalSpinal CordMorphineHernia, InguinalAnalgesics, Non-NarcoticAnesthetics, LocalAdaptation, PsychologicalDepressionQuality of LifeVisceral PainPosterior Horn CellsSpinal NervesSeverity of Illness IndexActivities of Daily LivingMusculoskeletal DiseasesPeripheral Nervous System DiseasesHeadacheIllness BehaviorTranscutaneous Electric Nerve StimulationHypnosisTrigeminal Nerve DiseasesGanglia, SpinalWhiplash InjuriesSurgical MeshAnxietyRats, Sprague-DawleySciaticaVulvodyniaAcupuncture TherapyNerve BlockHydromorphoneElectric Stimulation TherapySensory Receptor CellsTime FactorsAmitriptylinePrescription Drug MisuseProspective StudiesHyperesthesiaTrigeminal NeuralgiaCyclohexanecarboxylic AcidsCross-Sectional StudiesNeuralgia, PostherpeticPrevalencePeripheral Nerve InjuriesDouble-Blind MethodFreund's AdjuvantHerniorrhaphyDisease Models, AnimalSpinal Cord InjuriesCognitive TherapyPsychometricsSpinal Cord StimulationHot TemperaturePhysical StimulationLidocaineFollow-Up StudiesSomatoform DisordersLabor PainNarcotic AntagonistsFailed Back Surgery SyndromeBehavior, Animal