What is it?

A subarachnoid hemorrhage is bleeding that occurs in the space between the brain tissue and the subarachnoid space. The main cause of subarachnoid hemorrhage is the rupture of an aneurysm, which is an abnormal blood vessel. Other causes may include trauma, arteriovenous malformation and other health problems. The first symptom of subarachnoid hemorrhage is a severe sharp headache. Other symptoms may include nausea, vomiting and loss of consciousness.

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Signs & symptoms

Symptoms include severe headache which is usually described by the patients as "the worst headache they have ever had", loss of consciousness, double vision, nausea, vomiting, trouble speaking, drooping eyelid, confusion and light sensitivity.


Diagnosis is based upon findings from medical history and physical examination. Further evaluation may include brain scans such as CT, MRI and cerebral angiography.


Treatment may include surgery, endovascular embolization and other procedures to help stabilize the patient’s condition and stop the bleeding.

☝️ This is not a substitute for professional medical advice. Please consult with your physician before making any medical decision.

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