A brain aneurysm is a bulge in a blood vessel in the brain that can develop silently and become dangerous if it leaks or ruptures. When it bursts, it can cause a hemorrhagic stroke, most often a subarachnoid hemorrhage, leading to brain bleeding, permanent damage, or death. Because aneurysms often show no warning, recognizing early symptoms is critical for survival. Doctors stress awareness because many people only discover the condition when it becomes life-threatening.
When symptoms do appear, they are usually sudden and severe. The most common warning sign is a “thunderclap” headache—an explosive, extremely painful headache often described as the worst in a person’s life. Other symptoms may include blurred or double vision, confusion, nausea or vomiting, stiff neck, sensitivity to light, seizures, fainting, pain around one eye, a drooping eyelid, a dilated pupil, or weakness and numbness. A leaking aneurysm can also cause a “sentinel bleed,” leading to a severe headache that may last for days. If several of these symptoms occur together, immediate emergency care is essential.
Risk factors include smoking, high blood pressure, excessive alcohol use, and drug use such as cocaine, all of which weaken blood vessels. Age, female gender, genetic conditions like Ehlers-Danlos syndrome or polycystic kidney disease, head trauma, and certain infections can also increase risk. To diagnose aneurysms, doctors use CT scans, MRIs, and cerebral angiography to identify bleeding and determine size and location.
Treatment depends on severity and risk. Options include surgical clipping, endovascular coiling, and flow diversion stents, while low-risk cases may only require monitoring. Lifestyle changes such as controlling blood pressure, quitting smoking, healthy eating, and stress management are also important. Early recognition and action can prevent rupture and save lives.
