You may be able to drive with a brain aneurysm if it is small, stable, and hasn’t ruptured. However, driving is typically restricted after a rupture, surgery, or if the aneurysm is large or growing. Your doctor and local motor vehicle laws will determine whether you can legally and safely drive.
When driving may be allowed
Many people with small, unruptured aneurysms under 7 millimeters can continue driving. These aneurysms often pose a low annual risk of rupture, especially if they are not growing and you have no history of bleeding. If your neurologist or neurosurgeon confirms your condition is stable, you may not face restrictions.
Regular imaging, such as MRA or CTA scans, helps monitor the aneurysm. As long as it shows no change, your doctor may approve driving. However, uncontrolled high blood pressure or stressful driving conditions can increase risk, so managing health factors is key.
When driving is restricted
After rupture or hemorrhage
If an aneurysm ruptures and causes a subarachnoid hemorrhage, driving is not allowed for a significant recovery period—often 6 to 12 months. This is because a rupture can cause brain injury, seizures, or cognitive issues that affect reaction time and awareness.
After treatment
Even successful treatment like coiling or clipping requires a recovery period before driving resumes. Most jurisdictions suspend driving rights temporarily after surgery. You must be cleared by a neurologist and meet medical guidelines before getting back behind the wheel.
Factors doctors consider
Neurosurgeons use tools like the PHASES score to assess rupture risk. This considers your age, history of bleeding, high blood pressure, aneurysm size, location, and ethnicity. A higher score means greater risk, which may lead to stricter driving limits.
Size matters. Aneurysms larger than 7 millimeters, especially in high-risk areas like the posterior communicating artery, are more likely to prompt restrictions. Growth seen on follow-up scans is a serious red flag and may lead to treatment and temporary loss of driving privileges.
Legal and reporting requirements
Laws vary by location. In the U.S., each state sets its own rules, and some require doctors to report certain medical conditions. In the U.K., the DVLA has clear guidelines allowing driving for small, stable aneurysms under specific conditions.
Not disclosing a known aneurysm to your insurer or motor vehicle agency could void coverage or lead to liability if you’re in an accident. Even if you feel fine, hiding a diagnosis carries legal and financial risk.
Commercial drivers face stricter rules
Professional drivers are held to higher standards. The FMCSA typically disqualifies drivers with untreated aneurysms, especially those over 5 millimeters. Returning to commercial driving after treatment requires long recovery periods and medical clearance, often lasting a year or more.
The risk isn’t just personal—it’s public. A rupture while driving a large vehicle could endanger many people. That’s why commercial guidelines err on the side of caution, even for small or stable aneurysms.