Brain aneurysm is a medical condition that has synonyms such as cerebral aneurysm, intracranial aneurysm, and a bulging blood vessel in the brain. A cerebral aneurysm is a weakened area in the blood vessel wall in the brain that causes a balloon-like bulge, whereas an intracranial aneurysm is an abnormal outpouching of a brain artery. A brain aneurysm can cause severe symptoms, including sudden headache, blurred vision, and a stiff neck. Additionally, it can lead to a stroke, disability, or even death if it ruptures. Therefore, early diagnosis and prompt treatment are crucial to prevent severe complications.