also called: intracranial aneurysm

A cerebral aneurysm is a bulge in the wall of a blood vessel in the brain that “balloons out” and fills with blood. An aneurysm can press on a nerve or surrounding tissue, and if undiagnosed or untreated, can potentially leak or burst. This is an extremely serious and life-threatening situation which lets blood spill into surrounding tissues (called a hemorrhage). Cerebral aneurysms can occur at any age, although they are more common in adults than in children, and are slightly more common in women than in men. A small, unchanging aneurysm will generally produce no symptoms, whereas a larger aneurysm that is steadily growing may produce symptoms such as headache, numbness, loss of feeling in the face or problems with the eyes. Immediately after an aneurysm ruptures, an individual may experience a sudden and unusually severe headache (‘worst headache of your life”), nausea, difficulty seeing, vomiting, and loss of consciousness.