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What exactly is a brain aneurysm?

A brain or cerebral aneurysm is caused by the dilation or bulging of part of the wall of an artery in the brain.

If the aneurysm has not ruptured, treatment may be recommended for symptomatic, large or irregularly shaped aneurysms. If an aneurysm ruptures, emergency treatment is often required to restore breathing and reduce the abnormally high pressure within the brain.

Small aneurysms may be symptom-free, but larger ones may cause loss of feeling in the face or eye problems. If they rupture, severe headache, nausea, visual impairment, vomiting and loss of consciousness or a stroke may occur. Numerous medical conditions are associated with this condition, including certain connective tissue disorders as well as high blood pressure and atherosclerosis
(fatty deposits in the arteries of the body).

Adequate treatment of these conditions is a good first step towards preventing the development of such a cerebral aneurysm.