SpasmHeadacheSpasms, InfantileHeadache DisordersTension-Type HeadacheCluster HeadacheHemifacial SpasmVascular HeadachesMigraine DisordersCoronary VasospasmHeadache Disorders, SecondaryEsophageal Spasm, DiffuseErgonovineAngina Pectoris, VariantFacial MusclesMigraine without AuraBlepharospasmSpinal PunctureVigabatrinMigraine with AuraBlood Patch, EpiduralNeurologyNeuromuscular AgentsTrigeminal Autonomic CephalalgiasAnalgesicsTryptaminesSumatriptanFacial Nerve DiseasesTrigeminal NerveDura MaterBotulinum Toxins, Type ATreatment OutcomeTrigeminal NeuralgiaIntracranial HypotensionSubarachnoid HemorrhageMagnetic Resonance ImagingAnticonvulsantsCerebellopontine AngleMuscle SpasticityPhotophobiaNitroglycerinPrevalenceTomography, X-Ray ComputedFacial NerveStiff-Person SyndromeChronic DiseasePain MeasurementAngina PectorisCoronary AngiographyQuestionnairesOxytocicsVasodilator AgentsAcetylcholineRetrospective StudiesFacial PainCerebral AngiographyNeurologic ExaminationProspective StudiesNerve Compression SyndromesMicrovascular Decompression SurgeryFacial NeuralgiaNeck PainDiagnostic Techniques, NeurologicalVasospasm, IntracranialPseudotumor CerebriFollow-Up StudiesCranial Nerve DiseasesSubdural SpaceFacial ParalysisAmitriptylineEpilepsyCoronary VesselsDouble-Blind MethodTime FactorsTemporomandibular Joint DisordersManometryRelaxation TherapyIntracranial AneurysmPainIsosorbide DinitrateRecurrenceElectroencephalographyAdrenocorticotropic Hormone