PainChronic PainPain ManagementPain ThresholdPain, PostoperativeLow Back PainBack PainPain MeasurementAbdominal PainNeck PainPain, IntractablePelvic PainPain PerceptionFacial PainAcute PainPain, ReferredShoulder PainMusculoskeletal PainAnalgesicsNociceptive PainNeuralgiaAnalgesics, OpioidMyofascial Pain SyndromesHyperalgesiaChronic DiseaseComplex Regional Pain SyndromesVisceral PainArthralgiaAnalgesiaLabor PainTreatment OutcomeNociceptorsQuestionnairesFibromyalgiaAnesthetics, LocalDisability EvaluationCatastrophizationFlank PainEye PainProspective StudiesTime FactorsDouble-Blind MethodMorphineAnalgesics, Non-NarcoticSeverity of Illness IndexInjections, SpinalLidocaineSciaticaNerve BlockToothacheQuality of LifeFollow-Up StudiesOsteoarthritis, KneeNociceptionPhysical Therapy ModalitiesMusculoskeletal DiseasesPhantom LimbSpinal NervesTemporomandibular Joint DisordersKnee JointRange of Motion, ArticularTrigeminal NeuralgiaRadiculopathySpinal CordPeripheral Nervous System DiseasesTranscutaneous Electric Nerve StimulationHot TemperatureAcupuncture AnalgesiaLumbosacral RegionIntervertebral Disc DisplacementTramadolOxycodoneAnti-Inflammatory Agents, Non-SteroidalCyclohexanecarboxylic AcidsBupivacaineMagnetic Resonance ImagingRetrospective StudiesAnalysis of VarianceOsteoarthritisCross-Sectional StudiesHeadacheActivities of Daily LivingRats, Sprague-DawleyInjections, Intra-ArticularExercise TherapyPalliative CareAcupuncture TherapyAnalgesia, Patient-ControlledAdaptation, PsychologicalReproducibility of ResultsGanglia, SpinalFacial NeuralgiaAnxietyPrevalenceAnesthesia, LocalInjections, EpiduralFentanylAcute DiseaseZygapophyseal JointPosterior Horn Cells