Abstract
Intracranial hypertension and intracranial hypotension are on the opposite end of the intracranial pressure spectra. It is extremely uncommon for both to cause headache in the same patient within a span of several days. This report describes a young man with intracranial hypertension who developed a severe excruciating headache due to intracranial hypotension after a diagnostic lumbar puncture. It is paradoxical that lumbar puncture, which is supposed to be a treatment option for patients with idiopathic intracranial hypertension, leads to headache due to intracranial hypotension.