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An aneurysm is a bulge in a blood vessel caused by a weakness in the blood vessel wall, usually where it branches.
Our Health A-Z contains more information on Aneurysm.
A subarachnoid haemorrhage is a type of stroke caused by bleeding in and around the brain.
Our Health A-Z contains more information on Subarachnoid haemorrhage.
Important: If you have these symptoms, they may be unrelated to any of these conditions listed. If you are concerned about your symptoms then you should see a doctor.