Is considered a type of stroke

Specifically it refers to bleeding into the area around the brain.

This area is between the pia mater and the arachnoid membrane.

This can occur following a hemorrhagic stroke.

Symptoms and complications can occur very quickly and this diagnosis is considered a medical emergency

Occurs in less than 10% of all strokes

Causes:
   -    Head trauma
   -    Brain aneurysm
   -    Tumors
   -    Cocaine abuse
   -    Unknown

Symptoms:
   -    Headache
   -    Nausea
   -    Vomiting
   -    Confusion
   -    Loss of consciousness
   -    Changes in blood pressure
   -    Seizures
   -    Coma
   -    Death

CT scan of brain is extremely helpful
Lumbar puncture may be helpful in some cases.

Treatment:
-    Emergency room management
-    Blood pressure control
-    Craniotomy
-    Neurosurgeon