7.1 Headache attributed to increased cerebrospinal fluid pressure

Coded elsewhere:
Headache attributed to intracranial pressure or hydrocephalus secondary to an intracranial neoplasm is coded as 7.4.1 Headache attributed to intracranial neoplasm.

Description:
Headache caused by increased cerebrospinal fluid (CSF) pressure, usually accompanied by other symptoms and/or clinical signs of intracranial hypertension. It remits after normalization of CSF pressure.

Diagnostic criteria:
A. Any headache fulfilling criterion C
B. Increased CSF pressure (>250 mm CSF) measured by lumbar puncture (performed in the lateral decubitus position, without sedative medications), epidural or intraventricular monitoring, with normal CSF chemistry and cellularity
C. Evidence of causation demonstrated by either or both of the following:

    1. headache has developed in temporal relation to intracranial hypertension
    2. headache is relieved by reducing intracranial pressure

D. Not better accounted for by another ICHD-3 diagnosis.