Subarachnoid hemorrhage, a medical emergency, is usually from a bulging blood vessel that bursts in the brain (aneurysm). It may lead to permanent brain damage or death if not treated promptly.
The main symptom is a sudden, severe headache.
Hospital care is needed for supportive care and to stop bleeding and limit brain damage. Treatment may include surgery or catheter-based therapy.
Last Updated Jun 13, 2017