Does Migraine Increase Dementia Risk? The Science Is More Complicated Than You Think
For many people living with migraine, one question often arises sooner or later:
"Am I damaging my brain?"
It is an understandable concern.
Many migraine patients have undergone an MRI and been told they have "white matter changes" or "white matter lesions." Others have seen headlines linking migraine to dementia, Alzheimer's disease, or accelerated brain aging.
So what does the evidence actually tell us?
The answer is both reassuring and intriguing.
What We Know
Migraine is much more than a headache disorder.
Over the past two decades, research has increasingly demonstrated that migraine involves widespread changes in brain networks responsible for sensory processing, pain modulation, attention, mood, and cognition.
Several large observational studies and recent meta-analyses suggest that people with migraine may have a modestly increased risk of developing dementia later in life, particularly vascular dementia and, in some studies, Alzheimer's disease. The association appears strongest among women and individuals with migraine with aura.
Importantly, however, an association does not prove causation.
Migraine does not necessarily cause dementia.
Instead, migraine and dementia may share some of the same underlying biological pathways.
The Vascular Connection
One of the most compelling theories involves the health of the brain's blood vessels.
Migraine, especially migraine with aura, has long been associated with a slightly increased risk of stroke and other vascular conditions.
Researchers have proposed several possible mechanisms:
• Altered vascular regulation
• Endothelial dysfunction
• Chronic neuroinflammation
• Oxidative stress
• Small vessel disease
These same processes are increasingly recognized as contributors to age-related cognitive decline and vascular dementia.
In other words, migraine and dementia may be connected through common vascular and inflammatory pathways rather than through a direct cause-and-effect relationship.
What About White Matter Lesions?
This is often where patients become most concerned.
MRI studies have consistently shown that individuals with migraine are more likely to have white matter hyperintensities, particularly those with frequent attacks or migraine with aura.
These findings appear as small bright spots on MRI scans.
White matter hyperintensities are also commonly seen in aging, hypertension, diabetes, and other vascular conditions. In the general population, a higher burden of white matter hyperintensities has been associated with increased risk of cognitive decline and dementia.
However, an important unanswered question remains:
Are migraine-related white matter changes biologically equivalent to the white matter changes seen in aging and vascular disease?
We do not yet know.
Many migraine patients with these MRI findings remain cognitively normal for decades.
The Emerging Brain Aging Story
One of the most interesting developments comes from newer MRI studies using machine-learning models to estimate "brain age."
A recent study reported that individuals with migraine demonstrated older-appearing brains compared with controls, with the greatest differences observed in patients with chronic migraine.
While these findings are intriguing, they should be interpreted cautiously.
Brain age is a research tool, not a diagnosis.
We do not yet know whether these imaging findings translate into meaningful differences in long-term cognitive outcomes.
What We Still Don't Know
This is where scientific humility matters.
We still do not know:
• Whether migraine directly contributes to dementia
• Whether migraine-related white matter changes represent the same pathology seen in aging brains
• Whether effective migraine treatment reduces future dementia risk
• Which migraine patients, if any, are most vulnerable to future cognitive decline
These are active areas of ongoing research.
What Patients Can Do Today
Fortunately, the factors most strongly associated with healthy cognitive aging are already well known.
For patients with migraine, the most important brain-health interventions are often the same interventions that improve migraine itself:
• Control blood pressure
• Maintain metabolic health
• Prioritize sleep
• Exercise regularly
• Avoid smoking
• Treat depression and anxiety
• Reduce migraine frequency when possible
These strategies support both brain health and migraine management.
The Bottom Line
Migraine is increasingly recognized as a whole-brain disorder rather than simply a headache condition.
There is growing evidence that migraine may be associated with markers of brain aging, vascular disease, and cognitive decline. Yet the relationship remains far from settled, and current evidence does not support the idea that migraine inevitably leads to dementia.
For now, the most reasonable conclusion is that migraine may represent one piece of a much larger brain-health puzzle.
Understanding and treating migraine effectively is not simply about reducing headache days.
It may also be an important part of preserving long-term brain health.
References
Zhu W, et al. Migraine is a risk factor for dementia: A systematic review and meta-analysis of cohort studies. Journal of Headache and Pain. 2025.
Fernandes C, et al. Migraine and cognitive dysfunction: A narrative review. Journal of Headache and Pain. 2024.
Shin H, et al. Association between migraine and risk of vascular dementia. PLOS One. 2024.
Park KM, et al. Association Between Small Vessel Disease and Migraine. 2025.
Recent MRI brain-age study discussed in Brain Communications (2026), reporting older-appearing brains in chronic migraine patients.
About the Author
Dr. Myrna Cardiel is a board-certified neurologist with more than 20 years of clinical experience specializing in migraine, headache disorders, brain health, and clinical neurophysiology. She served for nearly two decades on faculty at NYU Langone Health, where she was a Clinical Professor of Neurology and participated in initiatives focused on brain health and cognitive longevity.
Dr. Cardiel is board certified in Neurology, EMG, Lifestyle Medicine, and Obesity Medicine, and is also a Certified Menopause Society Practitioner. Her clinical interests focus on the intersection of migraine, cognitive aging, hormonal transitions, metabolic health, sleep, physical fitness and overall health with a particular emphasis on helping individuals navigate the neurological changes of midlife.
Through her practice, Cardiel Precision Brain Health, she provides a comprehensive, prevention-oriented approach to neurological care that integrates evidence-based medicine with personalized strategies to support long-term brain health and cognitive resilience.
