Orthostatic headache ocurring after a procedure or trauma causing a persistent cerebrospinal fluid (CSF) leakage resulting in low intracranial pressure. It remits after successful sealing of the CSF leak.
A. Any headache fulfilling criterion C
B. Both of the following:
1. a procedure has been performed, or trauma has occurred, known sometimes to cause persistent CSF leakage (CSF fistula)
2. low CSF pressure (<60 mm CSF) and/or evidence of low CSF pressure and/or of CSF leakage on MRI, myelography, CT myelography or radionucleide cisternography
C. Headache has developed in temporal relation to the procedure or trauma
D. Not better accounted for by another ICHD-3 diagnosis.