Editing Headache (section)

==== Lumbar puncture ====
A [[lumbar puncture]] is a procedure in which cerebral spinal fluid is removed from the spine with a needle. A lumbar puncture is necessary to look for infection or blood in the spinal fluid. A lumbar puncture can also evaluate the pressure in the spinal column, which can be useful for people with [[idiopathic intracranial hypertension]] (usually young, obese women who have increased intracranial pressure), or other causes of increased intracranial pressure. In most cases, a CT scan should be done first.<ref name=Goadsby />