Abdominal PainPainPain ManagementChronic PainAbdomen, AcutePain ThresholdPain MeasurementPain, PostoperativeBack PainLow Back PainPain, IntractableNeck PainPelvic PainPain PerceptionAcute PainAppendicitisGastrointestinal DiseasesIrritable Bowel SyndromeFacial PainTreatment OutcomeConstipationPain, ReferredIleal DiseasesTomography, X-Ray ComputedShoulder PainChronic DiseaseColonic Diseases, FunctionalQuestionnairesAbdomenTorsion AbnormalityMusculoskeletal PainSeverity of Illness IndexProspective StudiesDepressionIntestinal ObstructionRadiography, AbdominalFollow-Up StudiesRetrospective StudiesPancreatitisAnalgesicsColitis, IschemicIntestinal PerforationVisceral PainAcute DiseaseFlatulenceCecal DiseasesIntussusceptionTime FactorsSymptom AssessmentJejunal DiseasesColonic DiseasesVomitingDiarrheaRupture, SpontaneousRecurrenceQuality of LifePrevalenceNeuralgiaHeadacheEndoscopy, Digestive SystemPancreatitis, ChronicAnalgesics, OpioidNociceptive PainAnxietyLaparotomyAppendectomyDefecationRisk FactorsHemoperitoneumAppendixDiagnostic ErrorsMesenteric Vascular OcclusionEndoscopy, GastrointestinalLaparoscopyFatal OutcomeArthralgiaDiverticulitisHyperalgesiaDyspepsiaCholecystitisColicColonoscopyCross-Sectional StudiesPsychophysiologic DisordersNauseaPeritonitis, TuberculousIntestinal DiseasesDuodenal DiseasesMesenteric LymphadenitisGastrointestinal AgentsMyofascial Pain SyndromesComplex Regional Pain SyndromesPsychiatric Status Rating ScalesDouble-Blind MethodMagnetic Resonance ImagingBehavioral SymptomsHymenFlank PainMesenteric Artery, SuperiorStress, Psychological