title: Emesis-induced sub-periosteal haematoma: a case report.
abstract: BACKGROUND
  Orbital sub-periosteal haematoma (OSH) is usually caused by orbital trauma. We present a case of spontaneous OSH and review the literature on this condition.
  
  
  METHODS
  We present a case of sub-periosteal haematoma secondary to migraine and vigorous emesis.
  
  
  CONCLUSIONS
  OSH is very rare; this case highlights the clinical features of the condition and that rapid spontaneous resolution can occur. We review the literature on emesis- or valsava-induced OSH and discuss possible mechanisms for its formation in conjunction with migraine.
authors.affiliation: Sussex Eye Hospital, Brighton and Sussex University Hospital , Brighton BN2 5BE , United Kingdom and.
authors.forename: Jennifer R
authors.initials: JR
authors.lastname: Reid
authors.forename: Saul N
authors.initials: SN
authors.lastname: Rajak
authors.forename: C D
authors.initials: CD
authors.lastname: Good
authors.forename: G Paul
authors.initials: GP
authors.lastname: Brittain
mesh_terms: D005260:Female; D006406:Hematoma / Q000209:etiology*; D006801:Humans; D009916:Orbital Diseases / Q000209:etiology*; D014839:Vomiting / Q000150:complications*; D055815:Young Adult