• cause
  • The commonest cause, however, is a spontaneous defect of the dura (spontaneous intracranial hypotension [SIH]), though a trivial traumatic event can be elicited retrospectively in around one third of such patients. (hkmj.org)
  • Spontaneous intracranial hypotension is an increasingly diagnosed cause of headache, with an incidence of one in 50 000 individuals. (hkmj.org)
  • cerebrospinal fluid
  • The most common cause of orthostatic headache is low cerebrospinal fluid pressure, due to a spontaneous cerebrospinal fluid leak, a traumatic cerebrospinal fluid leak, or a post-dural-puncture leak. (wikipedia.org)
  • headache
  • Orthostatic headache is a medical condition in which a person develops a headache while vertical and the headache is relieved when horizontal. (wikipedia.org)