====== Spontaneous subarachnoid hemorrhage diagnosis ======
The diagnosis of SAH should be considered in any patient with a severe and sudden onset or rapidly escalating [[headache]]. With such a large number of patients presenting to the ED with a chief complaint of headache, differentiating those with a benign cause from those with an emergent etiology such as [[SAH]] can be difficult. Deciding which patients require a workup for SAH is often the most challenging part of the emergency physician’s care, in part due to the low frequency and high acuity of the illness.

===== Computed tomography =====

see [[Computed tomography for spontaneous subarachnoid hemorrhage diagnosis]].

===== Lumbar Puncture =====

see [[Lumbar puncture for subarachnoid hemorrhage]].