PainPain MeasurementPain ManagementPain, PostoperativeChronic PainAnalgesics, OpioidPain, IntractableBack PainAnalgesicsFacial PainPain ThresholdBrachial Plexus NeuritisOxycodoneLow Back PainMorphineTramadolAnalgesiaAbdominal PainNeck PainNeuralgiaPelvic PainPain PerceptionAnesthetics, LocalChronic DiseaseAcute PainTreatment OutcomePain, ReferredHemorrhoidsLidocaineSeverity of Illness IndexReflex Sympathetic DystrophyProspective StudiesFentanylShoulder PainHyperalgesiaAnalgesics, Non-NarcoticMusculoskeletal PainAnesthesia, LocalVertebroplastyDrug TolerancePalliative CareDouble-Blind MethodMiddle EastFollow-Up StudiesAnalgesia, Patient-ControlledNerve BlockFractures, CompressionReceptors, Opioid, muQuestionnairesSacrumOpioid-Related DisordersDisability EvaluationTime FactorsHerpes ZosterOsteoarthritis, KneeRange of Motion, ArticularNociceptive PainSpinal FracturesRetrospective StudiesSpinal NeoplasmsCross-Sectional StudiesBone NeoplasmsAnemia, Sickle CellArthroplasty, Replacement, KneeOsteoarthritisNeoplasmsKnee JointPrevalenceAnti-Inflammatory Agents, Non-SteroidalQuality of LifeInjections, IntravenousAcute DiseaseMyofascial Pain SyndromesComplex Regional Pain SyndromesVisceral PainPostoperative ComplicationsTomography, X-Ray ComputedArthralgiaAge FactorsCohort StudiesLabor PainLongitudinal StudiesRisk FactorsDose-Response Relationship, DrugNociceptorsLogistic ModelsSocioeconomic FactorsFibromyalgiaPatient SatisfactionCatastrophizationFlank PainEye PainInjections, SpinalSciaticaToothacheNociceptionPhysical Therapy ModalitiesSpinal NervesPhantom LimbMusculoskeletal Diseases