A brain aneurysm is a bulge or ballooning in a blood vessel in the brain. This occurs when the wall of the blood vessel weakens, causing it to swell. If the aneurysm grows large enough, it can press on nearby nerves or brain tissue, leading to symptoms like headaches, vision problems, or even seizures.
If a brain aneurysm ruptures, it can cause a serious condition called a subarachnoid hemorrhage, which is bleeding in the space surrounding the brain. This can lead to severe complications, including stroke or even death, making it crucial to seek medical attention if symptoms arise.