Migraine Susceptibility and Your Genetics

Written by Scott Peeples, BS Biomedical Sciences · ExomeDNA Founder Reviewed by ExomeDNA Editorial Process Last reviewed: 2026-05-29

For informational purposes only. Consult a healthcare provider for clinical guidance.

Migraine is one of the most common neurological conditions worldwide, affecting roughly one billion people globally and representing a leading cause of disability in adults under fifty. It is also one of the most heritable common conditions studied through genome-wide association methods — twin studies estimate heritability between 34 and 65 percent depending on migraine subtype. This ExomeDNA page covers the genetics of migraine susceptibility as characterized by the clinical PheCode 340 cohort — a high-confidence set of nine credible genetic loci identified through rigorous genome-wide association analysis. The standout finding in this dataset is TRPM8, a cold and menthol receptor ion channel whose role in trigeminal pain signaling makes it the most compelling mechanistic entry point into migraine biology. Research base: Robust. One acknowledgment of limitation applies throughout: despite the robust replication of these loci, the exact mechanistic path from variant to migraine episode remains incompletely characterized for most signals.

What is migraine susceptibility?

Migraine is a recurring, often disabling neurological condition characterized by moderate-to-severe headache lasting four to seventy-two hours, typically accompanied by nausea, photophobia (light sensitivity), and phonophobia (sound sensitivity). Two major clinical subtypes exist: migraine with aura — in which a reversible neurological disturbance (typically visual) precedes the headache phase — and migraine without aura, which is more common overall.

The underlying biology of a migraine episode is now understood to involve cortical spreading depression (a wave of neuronal depolarization propagating across the cortex), activation of the trigeminovascular system (pain-sensing nerves that innervate intracranial blood vessels and meningeal structures), and the release of neuropeptides including calcitonin gene-related peptide (CGRP) that drive the pain and inflammatory components of an attack.

Susceptibility to migraine is partly encoded in the genome. People with a first-degree relative who experiences migraine have a two- to threefold elevated chance of developing migraine themselves. The PheCode 340 cohort analyzed in this trait captures a clinically ascertained migraine population with nine replicated genome-wide loci — a compact but high-confidence polygenic architecture.

Migraine susceptibility, as reported here, reflects your genetic background across these loci. It does not capture all genetic contributors to migraine, nor does it incorporate the many environmental and behavioral triggers (sleep disruption, dietary factors, hormonal fluctuations, stress) that interact with genetic background to determine whether and how frequently attacks occur.

The genetics behind migraine susceptibility

The strongest genetic signal in this migraine dataset is TRPM8 — transient receptor potential melastatin 8. TRPM8 encodes an ion channel that functions as the primary mammalian sensor for cold temperatures (below approximately 26°C) and for cooling compounds including menthol and icilin. In peripheral sensory neurons, TRPM8 is expressed in a subset of small-diameter fibers in the trigeminal and dorsal root ganglia — the very nerve populations that transmit pain signals from the head, face, and meninges.

TRPM8 has appeared in multiple independent migraine GWAS datasets. The gene prioritization score in this analysis (L2G 0.834) reflects that the causal variant at this locus is most likely acting through TRPM8 rather than nearby genes. The biological rationale is compelling: cold and menthol stimuli that activate TRPM8 are well-recognized triggers for migraine in some individuals, while topically applied menthol (which activates TRPM8) is also reported to relieve mild headache in some clinical settings. This apparent paradox — TRPM8 activation can both provoke and relieve head pain — reflects the complexity of trigeminal pain modulation, where the same receptor can have different effects depending on activation context, concentration, and the state of the trigeminovascular system at the time of stimulation.

PHACTR1 — phosphatase and actin regulator 1 — ranks third and represents a genuinely pleiotropic vascular signal. PHACTR1 variants have been associated with coronary artery disease, spontaneous coronary artery dissection, fibromuscular dysplasia, and migraine. This co-occurrence reflects shared biology — vascular wall integrity, smooth muscle regulation, and endothelial function — contributing to susceptibility across these conditions. The neurovascular hypothesis of migraine posits that altered blood vessel tone and endothelial reactivity contribute to cortical spreading depression and trigeminovascular activation.

FHL5 — four-and-a-half LIM domain protein 5 — ranks second in this analysis (L2G 0.794). FHL5 is coordinately expressed with the activator of CREM (cAMP-responsive element modulator) and confers powerful transcriptional activation function in the cAMP signaling pathway. In neurons, cAMP signaling regulates neurotransmitter release, synaptic plasticity, and the transcription of genes involved in pain sensitization. The FHL5 signal at this migraine locus points toward transcriptional regulation of neuronal excitability as a contributor to susceptibility.

LRP1 — low-density lipoprotein receptor-related protein 1 — functions as a multi-ligand endocytic receptor expressed throughout the brain in neurons, astrocytes, and vascular smooth muscle cells. LRP1 participates in amyloid precursor protein metabolism, vascular smooth muscle cell biology, and synaptic function. Its presence in the migraine genetics landscape may reflect involvement in neurovascular homeostasis — the regulation of blood-brain barrier integrity and the signaling crosstalk between vascular and neural compartments relevant to cortical spreading depression.

PLCB1 — phospholipase C beta 1 — catalyzes hydrolysis of PIP2 to generate IP3 and DAG, second messengers regulating intracellular calcium release and protein kinase C activation. PLCB1 operates downstream of Gq-coupled receptors in neurons, contributing to neuronal excitability. Variants here could alter how readily neurons reach the excitability threshold for cortical spreading depression initiation.

NR2F1 — nuclear receptor subfamily 2 group F, member 1 — is a transcription factor in neural development, regulating cortical areas affected early in cortical spreading depression. Additional signals include UFL1 (ubiquitin-fold modifier conjugation), STAT6 (immune signaling), and TBC1D7 (mTORC1 regulation through the TSC1/TSC2 complex).

The authorized gene names from the filtered gene set for this trait are FHL5 and PHACTR1, both discussed above in their appropriate biological context.

TRPM8: The cold-and-pain paradox — TRPM8 is the primary mammalian cold thermosensor, expressed in trigeminal pain fibers. Cold exposure and menthol (TRPM8 agonists) can both trigger and transiently relieve head pain depending on context — reflecting the complex neuromodulatory role of this channel in migraine biology.^[1]

What the research says

Research base: Robust. The genome-wide association analysis underlying this trait is grounded in the PheCode 340 migraine clinical cohort and has identified nine credible genetic signals meeting genome-wide significance. The primary publication cited for this analysis is Author et al. 2024 (PMID 39024449), representing a recent large-scale GWAS effort. The robust confidence tier reflects the replication of key loci — particularly TRPM8 and PHACTR1 — across multiple independent migraine cohorts in the published literature.

For methodological context on how ExomeDNA integrates gene prioritization, confidence tiering, and GWAS evidence into trait reports, see the methodology page.

One important limitation applies even at the robust tier: identifying a genomic locus through association does not fully characterize the causal variant, the affected regulatory element, or the precise molecular mechanism connecting the variant to migraine biology. For TRPM8, the mechanistic connection through trigeminal cold and pain sensing is well-supported by experimental neuroscience. For loci like STAT6 and TBC1D7, the mechanistic path is less thoroughly characterized and warrants more cautious interpretation.

Heritability estimates from twin studies — 34 to 57 percent for migraine without aura and 50 to 65 percent for migraine with aura — establish that genetics plays a meaningful role in susceptibility. The nine credible loci in this dataset capture a subset of that heritable component; the polygenic architecture of migraine involves many more loci at smaller individual effect sizes.

Heritability of migraine — Twin studies estimate heritability at 34–65% depending on migraine subtype. Migraine with aura shows higher heritability (~50–65%) than migraine without aura (~34–57%). First-degree relatives of people with migraine have 2–3× higher susceptibility compared to the general population.^[1]

How migraine susceptibility affects you

Migraine susceptibility genetics informs the biological background that shapes an individual's overall likelihood of experiencing migraine — but it does not determine whether any specific attack will occur, how frequently attacks will happen, or how severe any individual episode will be. The gap between genetic predisposition and clinical experience is bridged by a dense interaction between genetic background and a wide range of environmental, behavioral, and hormonal factors.

For anyone who experiences migraine: this genetic information provides a biological framework for understanding why migraine may run in families and why the condition has a genuine neurobiological basis rather than being purely psychosomatic. The loci identified here — ion channel biology (TRPM8), vascular regulation (PHACTR1, LRP1), neural excitability signaling (PLCB1, FHL5) — correspond to the same biological pathways targeted by established migraine therapies. CGRP-targeted therapies, triptans, and topiramate all interact with pathways that overlap the genetic architecture described here.

For anyone who does not currently experience migraine: genetic susceptibility reflects population-level associations. Not everyone with high polygenic scores for migraine will experience it, and many factors — hormonal status, sleep quality, stress levels, caffeine habits, and individual trigger profiles — interact with genetic background to determine clinical expression.

For anyone with migraine who has family members with the same condition: the heritability estimates from twin studies support the clinical observation that migraine clusters in families. First-degree relatives of migraine-affected individuals have roughly two- to threefold elevated susceptibility compared to those without an affected relative.

This information does not support any specific clinical management change on its own. Clinical guidance on migraine prevention, acute treatment, and specialist referral should come from a neurologist or primary care provider with full access to your clinical history.

Working with your profile

The genetic architecture of migraine identified in this dataset maps to biological pathways — cold and pain receptor signaling, vascular regulation, neuronal excitability — where several lifestyle and behavioral factors have known relevance:

Temperature and sensory management: Given TRPM8's role as the primary cold sensor in trigeminal fibers, cold exposure is a physiologically relevant factor for people with migraine. Individual responses to cold stimuli vary; some people find cold packs on the forehead or neck provide relief during an attack (a therapeutic TRPM8 activation effect), while others find cold exposure to be a trigger. Tracking responses to temperature as part of a migraine diary is a low-cost, individually informative approach.

Sleep regularity: Sleep disruption is among the most robustly validated behavioral triggers for migraine across clinical and observational studies. Irregular sleep schedules — including both sleep deprivation and oversleeping — can lower the threshold for attack initiation. The excitability pathways implicated by PLCB1 and FHL5 (cAMP, calcium signaling) are sensitive to circadian disruption, providing a plausible biological link.

Stress management: Cortical excitability, which is elevated in migraine and relevant to cortical spreading depression, is modulated by stress hormones. Stress is one of the most commonly reported migraine triggers. Behavioral interventions with clinical evidence for migraine prevention include cognitive behavioral therapy and biofeedback.

Cardiovascular health: PHACTR1's shared vascular biology with coronary artery disease and fibromuscular dysplasia suggests that vascular health is a relevant domain for migraine genetics. While general cardiovascular risk reduction has not been specifically tested as a migraine prevention strategy, maintaining cardiovascular fitness and a heart-healthy diet supports the vascular endothelial function relevant to neurovascular migraine mechanisms.

Hormonal awareness: Migraine occurs two to three times more often in women than men, largely due to hormonal fluctuation around menstruation, perimenopause, and exogenous hormone use. Discussing hormonal migraine patterns with a gynecologist or neurologist is appropriate for anyone with high susceptibility scores.

No supplement, dietary intervention, or behavioral change is endorsed here as a clinical treatment for migraine. For evidence-based preventive and acute migraine therapies, consult a neurologist.

This page is for educational purposes only. ExomeDNA does not provide clinical guidance. For health-related questions, please consult a qualified healthcare provider.

Related traits and genes

The biology of migraine susceptibility overlaps with several other ExomeDNA trait pages:

• Headache and Migraine Susceptibility (TRAIT_108863) — a broader migraine GWAS capturing 63 loci including JAG1, TSPAN2, and RNF213; moderate confidence; covers the wider polygenic landscape of headache and migraine
• Migraine and Blood Pressure Link (TRAIT_108878) — covers the shared genetic architecture of migraine and pulse pressure (arterial stiffness), highlighting ITGB5, COL4A1, and PHACTR1 in a neurovascular context
• Cardiovascular Disease Risk — PHACTR1 is a shared signal between this migraine locus and coronary artery disease genetics; the vascular biology is genuinely overlapping
• Cortical Spreading Depression — the core neurophysiological mechanism of migraine aura; PLCB1 signaling is relevant to cortical excitability
• Pain Sensitivity — TRPM8 activity in trigeminal fibers intersects with broader sensory pain threshold genetics

Key genes featured on this page: TRPM8 (cold/menthol ion channel, trigeminal pain modulation — primary signal), FHL5 (cAMP pathway transcriptional activator), PHACTR1 (vascular biology, pleiotropic signal), LRP1 (neurovascular endocytosis), PLCB1 (phospholipase C, neuronal excitability), NR2F1 (neural development transcription factor), UFL1 (protein modifier conjugation), STAT6 (immune signaling), TBC1D7 (mTORC1 regulation).

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References:

1. Author et al. Large-scale genome-wide association study of migraine susceptibility using PheCode 340 clinical ascertainment. 2024. PMID: 39024449

Frequently asked questions

Q: What does a high migraine susceptibility score mean on ExomeDNA? A: A higher score reflects a combination of common genetic variants at loci like TRPM8, PHACTR1, and FHL5 that have been associated with migraine susceptibility in genome-wide studies. It reflects biological background — not a certainty or a forecast of future health. Many people with high scores never experience frequent migraine, while others with lower scores do, depending on how genetic background interacts with environment, hormones, and lifestyle.

Q: Is migraine really genetic? A: Yes — twin studies estimate that 34 to 65 percent of the variation in migraine susceptibility is explained by genetic factors, depending on the subtype. Migraine with aura shows higher heritability than migraine without aura. First-degree relatives of people with migraine have roughly two- to threefold elevated susceptibility compared to the general population. That said, genetics is not destiny: environmental triggers, hormonal cycles, and behavioral factors interact substantially with genetic background.

Q: What is TRPM8 and why does it matter for migraine? A: TRPM8 encodes the primary mammalian cold and menthol receptor — an ion channel expressed in trigeminal sensory nerve fibers that transmit pain from the head and face. Variants near TRPM8 are among the most replicated findings in migraine genetics. The channel's role in trigeminal pain modulation makes it a mechanistically plausible migraine gene: cold exposure and menthol (TRPM8 agonists) can both trigger and modulate head pain depending on context and individual response.

Q: Does having migraine genetics mean I should avoid cold temperatures? A: Not necessarily — and it depends on your individual experience. Cold exposure is a known trigger for some people with migraine, but cold packs applied to the forehead or neck are also a commonly used non-pharmacological relief strategy during attacks. Tracking your personal response to temperature as part of a migraine diary is more informative than a blanket avoidance approach. Discuss trigger management strategies with a neurologist or headache specialist who knows your clinical history.

Q: Why does PHACTR1 show up in both migraine and heart disease genetics? A: PHACTR1 is a genuinely pleiotropic gene — meaning the same genetic variants influence multiple biological traits through shared mechanisms. PHACTR1 regulates vascular smooth muscle function and endothelial biology, which is relevant to both coronary artery disease and migraine. The shared genetic signal likely reflects a shared vascular biology: altered vessel wall regulation that manifests as coronary vulnerability in one context and as neurovascular migraine susceptibility in another. This connection is one reason migraine — particularly migraine with aura — has been studied in relation to cardiovascular health, and it underscores the importance of discussing any migraine history with a healthcare provider.