Pain ThresholdPainPain MeasurementPain ManagementPain PerceptionChronic PainHyperalgesiaHot TemperatureEar, ExternalDiffuse Noxious Inhibitory ControlAnalgesiaAnalgesics, OpioidAnalgesicsAnalgesics, Non-NarcoticPain, PostoperativeCold TemperatureLow Back PainBack PainPressureTranscutaneous Electric Nerve StimulationAlfentanilFibromyalgiaWristPentazocinePhysical StimulationAbdominal PainNeck PainPain, IntractablePelvic PainFacial PainSensory ThresholdsAcute PainPain, ReferredElectric Stimulation TherapyCatechol O-MethyltransferaseDouble-Blind MethodShoulder PainMorphineMusculoskeletal PainCross-Over StudiesCapsaicinSex CharacteristicsElectric StimulationNociceptive PainNeuralgiaSkinTime FactorsMyofascial Pain SyndromesComplex Regional Pain SyndromesChronic DiseaseVisceral PainArthralgiaModels, BiologicalLabor PainTreatment OutcomeNociceptorsQuestionnairesAnesthetics, LocalDisability EvaluationCatastrophizationFlank PainEye PainProspective StudiesSeverity of Illness IndexInjections, SpinalSciaticaToothacheLidocaineNerve BlockOsteoarthritis, KneeQuality of LifeFollow-Up StudiesNociceptionPhysical Therapy ModalitiesSpinal NervesPhantom LimbMusculoskeletal DiseasesTrigeminal NeuralgiaTemporomandibular Joint DisordersKnee JointRadiculopathyRange of Motion, ArticularPeripheral Nervous System DiseasesSpinal CordAcupuncture AnalgesiaTramadolIntervertebral Disc DisplacementLumbosacral RegionOxycodoneCyclohexanecarboxylic AcidsBupivacaineAnti-Inflammatory Agents, Non-SteroidalOsteoarthritisHeadacheInjections, Intra-ArticularRetrospective StudiesAnalgesia, Patient-ControlledActivities of Daily LivingFacial NeuralgiaExercise Therapy