Abdominal PainPainPain MeasurementPain ManagementPain, PostoperativeChronic PainPain, IntractableBack PainPain ThresholdAnalgesics, OpioidLow Back PainFacial PainAnalgesicsNeck PainPelvic PainPain PerceptionAbdomen, AcuteAcute PainPain, ReferredBrachial Plexus NeuritisNeuralgiaMorphineOxycodoneTreatment OutcomeChronic DiseaseAnalgesiaTramadolShoulder PainMusculoskeletal PainProspective StudiesSeverity of Illness IndexAnesthetics, LocalAppendicitisHyperalgesiaFollow-Up StudiesDouble-Blind MethodLidocaineTomography, X-Ray ComputedIrritable Bowel SyndromeQuestionnairesNociceptive PainGastrointestinal DiseasesReflex Sympathetic DystrophyVisceral PainHemorrhoidsRetrospective StudiesAnalgesics, Non-NarcoticFentanylConstipationTime FactorsIleal DiseasesAcute DiseasePalliative CareAbdomenAnesthesia, LocalTorsion AbnormalityNerve BlockDisability EvaluationAnalgesia, Patient-ControlledMyofascial Pain SyndromesVertebroplastyDrug ToleranceComplex Regional Pain SyndromesColonic Diseases, FunctionalArthralgiaIntestinal ObstructionOsteoarthritis, KneePrevalenceMiddle EastRadiography, AbdominalOpioid-Related DisordersRange of Motion, ArticularCross-Sectional StudiesPancreatitisSacrumQuality of LifeColitis, IschemicAnti-Inflammatory Agents, Non-SteroidalIntestinal PerforationFractures, CompressionLabor PainReceptors, Opioid, muKnee JointOsteoarthritisCecal DiseasesHerpes ZosterIntussusceptionNeoplasmsJejunal DiseasesAnemia, Sickle CellFlank PainPancreatitis, ChronicRupture, SpontaneousColonic DiseasesSpinal FracturesBone NeoplasmsPostoperative ComplicationsSpinal NeoplasmsLaparotomyNociceptors