Chronic PainComplex Regional Pain SyndromesPainPain ManagementPain MeasurementPain ThresholdFibromyalgiaPatellofemoral Pain SyndromeChronic DiseaseSyndromeMyofascial Pain SyndromesHyperalgesiaReflex Sympathetic DystrophyPelvic PainProstatitisPain, IntractableCystitis, InterstitialAcute PainNeuralgiaCausalgiaAnalgesicsBack PainPain, PostoperativeNeck PainAbdominal PainLow Back PainAutonomic Nerve BlockAnalgesics, OpioidPain PerceptionFacial PainPain ClinicsArthralgiaDown SyndromeNociceptive PainMetabolic Syndrome XFacial NeuralgiaShoulder PainMusculoskeletal PainFailed Back Surgery SyndromeNociceptorsTreatment OutcomeSomatosensory DisordersAnalgesiaElectric Stimulation TherapyQuestionnairesAnesthetics, LocalBursitisTrigger PointsNociceptionSurgical TapePain, ReferredNephrotic SyndromeTrigeminal NeuralgiaTranscutaneous Electric Nerve StimulationCyclohexanecarboxylic AcidsSjogren's SyndromePeripheral Nervous System DiseasesOpioid-Related DisordersNeuralgia, PostherpeticSeverity of Illness IndexPhysical Therapy ModalitiesDisability EvaluationSpinal CordProspective StudiesLidocaineSomatoform DisordersThalamic DiseasesPhysical StimulationTime FactorsInjections, SpinalPrevalenceQuality of LifeNAV1.7 Voltage-Gated Sodium ChannelFollow-Up StudiesGanglia, SpinalDisease Models, AnimalTurner SyndromeStellate GanglionRats, Sprague-DawleySpinal Cord StimulationFootRetrospective StudiesHeadachePhantom LimbNerve BlockSciaticaRange of Motion, ArticularNerve Fibers, UnmyelinatedDepressionImagery (Psychotherapy)Analysis of VariancePudendal NeuralgiaOxycodoneAbnormalities, MultipleMyelodysplastic SyndromesSensory Receptor CellsSkin TemperatureRisk FactorsTouchDouble-Blind Method