Cerebral aneurysms are localized dilations of arteries in the brain. They can be saccular, fusiform, or dissecting in shape. The most common location is on arteries in the Circle of Willis. Risk factors include hypertension, smoking, and trauma. Symptoms may include sudden headache, nausea, vision changes, and seizures. Diagnosis is made through CT, MRI, or CT angiography. Treatment options are surgical clipping or endovascular coiling to prevent rupture and bleeding. Nursing management focuses on monitoring for complications and educating on risk factor modification.