title: Trigger factors mainly from the environmental type are reported by adolescents with migraine.
abstract: Migraine can be triggered by many factors such as stress, sleep, fasting and environmental causes. There are few studies that evaluated migraine trigger factors in the adolescent population.
  
  
  METHODS
  A total of 100 participants from 10 to 19 years were subjected to a detailed headache questionnaire, with demographic and clinical data, and a headache diary including trigger factors during a two-month period was asked.
  
  
  RESULTS
  Fifty of the participants exhibited chronic migraine and the other 50 participants demonstrated episodic migraine. The most common group of trigger factors reported was the environmental one, mainly sun/clarity, followed by hot weather and the smell of perfume.
  
  
  CONCLUSIONS
  Ninety-one percent of children and adolescents with migraine reported a trigger factor precipitating the migraine attack.
authors.affiliation: Department of Neurology and Neurosurgery, Federal University of São Paulo (UNIFESP), São Paulo SP, Brazil.
authors.forename: Marcela Dalla Bernardina
authors.initials: MD
authors.lastname: Fraga
authors.forename: Ricardo Silva
authors.initials: RS
authors.lastname: Pinho
authors.forename: Solange
authors.initials: S
authors.lastname: Andreoni
authors.forename: Maria Sylvia de Souza
authors.initials: MS
authors.lastname: Vitalle
authors.forename: Mauro
authors.initials: M
authors.lastname: Fisberg
authors.forename: Mario Fernando Prieto
authors.initials: MF
authors.lastname: Peres
authors.forename: Luiz Celso Pereira
authors.initials: LC
authors.lastname: Vilanova
authors.forename: Marcelo Rodrigues
authors.initials: MR
authors.lastname: Masruha
mesh_terms: D000293:Adolescent; D001938:Brazil; D002648:Child; D004812:Epidemiologic Methods; D005260:Female; D006801:Humans; D008297:Male; D008881:Migraine Disorders / Q000209:etiology* / Q000503:physiopathology; D015985:Precipitating Factors; D012307:Risk Factors; D017678:Sex Distribution; D012737:Sex Factors