Chronic PainPainPain ManagementPain MeasurementPain ThresholdPain, IntractablePain, PostoperativeBack PainLow Back PainPain PerceptionNeck PainChronic DiseaseAcute PainAbdominal PainFacial PainPelvic PainAnalgesicsAnalgesics, OpioidNeuralgiaMusculoskeletal PainPain, ReferredShoulder PainHyperalgesiaPain ClinicsNociceptive PainFibromyalgiaAnalgesiaComplex Regional Pain SyndromesNociceptorsMyofascial Pain SyndromesQuestionnairesArthralgiaOpioid-Related DisordersTreatment OutcomeVisceral PainDisability EvaluationOxycodoneInjections, SpinalAnesthetics, LocalNociceptionTemporomandibular Joint DisordersMorphineSpinal CordAnalgesics, Non-NarcoticCentral Nervous System SensitizationQuality of LifeSeverity of Illness IndexLabor PainSpinal NervesAdaptation, PsychologicalDepressionPosterior Horn CellsMusculoskeletal DiseasesSciaticaPeripheral Nervous System DiseasesHernia, InguinalProspective StudiesActivities of Daily LivingNerve BlockTranscutaneous Electric Nerve StimulationHeadacheTime FactorsDouble-Blind MethodGanglia, SpinalIllness BehaviorTrigeminal NeuralgiaRats, Sprague-DawleyAcupuncture TherapyAnxietyLidocaineHypnosisWhiplash InjuriesCyclohexanecarboxylic AcidsElectric Stimulation TherapyFollow-Up StudiesToothacheTrigeminal Nerve DiseasesCatastrophizationSensory Receptor CellsCross-Sectional StudiesHydromorphoneFlank PainPrevalenceHyperesthesiaPhysical Therapy ModalitiesHot TemperatureNeuralgia, PostherpeticAmitriptylineOsteoarthritisEye PainAnti-Inflammatory Agents, Non-SteroidalTramadolVulvodyniaSurgical MeshFreund's AdjuvantDisease Models, AnimalRetrospective StudiesHypesthesiaAnalysis of VariancePhantom Limb