Can Stress Cause Epileptic Seizures?

Stress ranks as the single most commonly reported seizure trigger among people with epilepsy, consistently topping surveys ahead of sleep deprivation, fatigue, and hormonal changes. That does not mean stress directly “causes” epilepsy in the way a head injury or genetic mutation might, but the evidence is strong that psychological stress can lower the threshold at which a seizure-prone brain fires. The relationship turns out to be more layered than a simple yes or no, though, because the type of stress, how long it lasts, and the individual’s own neurobiology all shape whether a stressful experience actually tips the scales toward a seizure.

How Often People With Epilepsy Blame Stress

Across multiple surveys spanning different countries and epilepsy types, stress surfaces as the top self-reported precipitant. Studies of adults with poorly controlled epilepsy find that stress, depression, tiredness, and the menstrual cycle are the most frequently named triggers, with stress leading the list.¹ Broader surveys of epilepsy patients confirm that stress and sleep deprivation are the two precipitants people mention most often.² The pattern holds in children, too. A study of 64 children with epilepsy found that about half reported seizures precipitated by acute stress, and diary analysis over six weeks showed a positive link between acute stress episodes and seizures in roughly 62% of the children who had at least one seizure during the tracking period.³

These numbers are striking, but they carry an important caveat. Asking someone “what triggered your seizure?” invites a kind of pattern-seeking that can inflate certain answers. Stress is almost always present in daily life, so linking it to seizure days is easy to do whether or not the connection is causal. Researchers have acknowledged this challenge for decades. One difficulty is that stress itself is hard to quantify, and individuals vary widely in how they perceive and report it. On top of that, stress triggers downstream behaviors like poor sleep, skipped medications, and increased alcohol use, any of which can independently provoke seizures. And seizures themselves cause stress, potentially creating a feedback loop that makes cause and effect hard to tease apart.

Acute Stress Versus Chronic Stress

One of the more surprising findings in this field is that acute and chronic stress do not affect seizure risk in the same direction. A brief, intense stressor, like a sudden fright or a single tough exam, can actually raise the seizure threshold temporarily. In rat experiments, acute swim stress elevated levels of certain neurosteroids derived from the stress hormone deoxycorticosterone. These neurosteroids enhance the activity of GABA receptors, which are the brain’s main braking system. The result was a measurable increase in the seizure threshold, meaning it became harder, not easier, to provoke a seizure right after the acute stressor.⁴ When researchers blocked the enzyme that converts deoxycorticosterone into those protective neurosteroids, the anti-seizure effect of acute stress vanished, confirming that the protection was specifically driven by the neurosteroid pathway.⁵

Chronic stress flips the equation. Prolonged or repeated stress tends to promote seizure occurrence in people with epilepsy.⁶ In animal models, sustained stress lowers seizure thresholds and accelerates the process by which a brain becomes more seizure-prone over time, through mechanisms involving changes in brain-derived neurotrophic factor and disruption of the body’s main stress-hormone axis.⁷ The protective neurosteroid surge that follows a brief stressor appears to wear down or become insufficient when stress is unrelenting, leaving the brain in a state where excitatory signals overwhelm inhibitory ones more easily.

What Happens in the Brain During Stress

When you encounter a stressor, your brain launches a hormonal cascade. The hypothalamus releases corticotropin-releasing hormone, or CRH, which eventually drives the adrenal glands to pump out cortisol. This system is designed to mobilize the body for action and then shut itself off. In epilepsy, several parts of this cascade can go wrong.

CRH itself is directly relevant to seizures. In infant rats, administering CRH produced seizures within minutes, originating in the amygdala before spreading to the hippocampus and cortex.⁸ At high enough levels, CRH has been shown to cause severe seizures and even neuronal death in brain areas involved with learning and memory.⁹ This matters because the hippocampus, a structure deeply involved in temporal lobe epilepsy, is both highly sensitive to stress mediators and particularly prone to seizures. Stress hormones interact with receptors there to alter the excitability of neurons and networks.¹⁰

Cortisol, the end product of this stress cascade, appears to have a direct relationship with epileptic brain activity in people whose seizures are stress-sensitive. A study measuring morning cortisol levels every 15 minutes alongside EEG recordings found that cortisol was positively linked to the frequency of abnormal brain discharges in people who reported stress-sensitive seizures, but not in those who did not consider stress a trigger for them.¹¹ This is a meaningful distinction. It suggests that the cortisol-seizure connection is not universal among people with epilepsy but is specifically relevant for a subgroup whose brains respond differently to stress hormones.

The Cortisol and Seizure Cycle Connection

Seizures in many people with epilepsy follow multiday cycles, clustering at predictable intervals. Recent research has started asking whether stress hormones track with these cycles. A study measuring salivary cortisol in people with temporal lobe epilepsy found that being at a seizure cycle peak was associated with about a 19% increase in cortisol compared to being at a cycle trough.¹² That said, the time of day explained the vast majority of the variation in cortisol levels (about 63%), and the seizure cycle itself added only about 1% of additional explained variance. Interestingly, perceived stress, as measured by questionnaires, did not track with the multiday seizure cycle at all.¹³ How stressed people felt bore no relationship to where they were in their seizure cycle. This disconnect between subjective stress and hormonal stress is a recurring theme in this research and one reason the field remains complicated.

Brain Imaging Reveals Different Stress Processing

Functional brain imaging has started to reveal why some people with epilepsy are more vulnerable to stress-triggered seizures than others. In studies using stress tasks during brain scans, people with temporal lobe epilepsy who reported stress-sensitive seizures showed increased brain activation in the superior temporal gyrus and insula during stressful conditions, compared to patients who did not report stress sensitivity.¹⁴ Those without stress sensitivity did not show these heightened responses.

A related imaging study found something striking about the hippocampus. In healthy controls, hippocampal activity increased during stressful math tasks as perceived stress went up. In epilepsy patients who reported stress-sensitive seizures, the opposite happened: hippocampal activity decreased as perceived stress increased. The researchers interpreted this as evidence of an inhibitory hippocampal mechanism that differs between people with epilepsy and healthy individuals, and that may underlie differences in resilience to stress.¹⁵ Another pilot study was the first to demonstrate a relationship between seizure control and both the stress-hormone response and brain activation patterns during psychosocial stress in temporal lobe epilepsy patients.¹⁶

Stress-Triggered Seizures Versus Psychogenic Non-Epileptic Seizures

When someone has a seizure during a stressful event, a critical diagnostic question arises: is this an epileptic seizure, or is it a psychogenic non-epileptic seizure (sometimes called a functional seizure)? The two look similar from the outside but are fundamentally different. Epileptic seizures involve abnormal electrical discharges in the brain. Functional seizures do not, even though they can involve convulsions, loss of awareness, and other dramatic symptoms. Stress is a major factor in both, which makes them easy to confuse.

A study comparing people with functional seizures to those with focal and generalized epilepsy found that depression and anxiety were more common in the functional seizure group, but the overall rate of self-reported stress was not significantly different between the two groups.¹⁷ This overlap is one reason doctors rely on EEG monitoring during events rather than patient history alone to tell the two apart. The distinction matters because the treatments are completely different. Epileptic seizures are managed with anti-seizure medications, while functional seizures are typically treated with psychological therapies. Being diagnosed with the wrong type can lead to years of ineffective treatment.

Early Life Stress and Long-Term Seizure Vulnerability

The timing of stress exposure may matter as much as its intensity. Research in animal models has consistently shown that stress during early development, including the perinatal period, accelerates the process by which the brain becomes epilepsy-prone and lowers seizure thresholds.¹⁸ In a rat model simulating early life adversity through limited bedding (which stresses both pups and mothers), animals exposed to adversity showed significantly faster development of epilepsy after a brain insult, along with greater disease severity, compared to controls raised normally.¹⁹

There is growing recognition that early life stress may create a lasting vulnerability to both epilepsy and the psychiatric conditions that often accompany it, like depression and anxiety. Adverse early life events could represent a shared risk factor for later development of epilepsy and its comorbid psychiatric disorders.²⁰ Human data reinforces this: people who experienced trauma or who have post-traumatic stress disorder show an elevated risk of developing epilepsy, particularly temporal lobe epilepsy, with brain scans revealing structural and functional changes in the emotional circuits of the brain.⁷

Sex Differences in Stress and Seizure Risk

The relationship between stress and seizures is not identical in males and females. In rats, experiments testing the effects of mild chronic stress combined with an acute restraint stressor revealed sex differences in how easily seizures could be triggered. Acute stress selectively reduced the effectiveness of GABA (the brain’s primary inhibitory neurotransmitter) at its receptors in group-housed females but not males. There were also sex-based differences in stress hormone responses. Overall, the effects of mild chronic stress on seizure susceptibility and inhibitory brain chemistry were complex and sex-selective.²¹ While translating rat findings directly to human experience is always uncertain, these results suggest that hormonal differences between sexes may shape how much stress affects an individual’s seizure threshold.

The Gut Microbiome Connection

An unexpected line of research has linked the gut microbiome to stress-related seizure vulnerability. In an experiment using a rat model of kindling (a process where repeated small electrical stimulations gradually produce full seizures), chronic stress accelerated how quickly and severely seizures developed. When researchers transplanted the gut bacteria from stressed animals into non-stressed ones, the recipients showed the same accelerated seizure progression. Even more remarkably, transplanting gut bacteria from calm animals into chronically stressed rats counteracted the pro-seizure effects of the stress.²² This is still early-stage science, and no one is prescribing probiotics for epilepsy based on these findings. But it points to a biological pathway connecting psychological stress to seizure susceptibility that runs through the gut, adding another layer to an already complex picture.

Can Managing Stress Reduce Seizures?

If stress worsens seizures, it is reasonable to ask whether stress-reduction techniques can help. There is some evidence they can. An assessor-blinded randomized trial tested mindfulness-based therapy against an active control (social support) in people with drug-resistant epilepsy. The mindfulness group showed significantly greater reductions in seizure frequency, as well as improvements in depressive and anxiety symptoms and memory performance.²³ Another study found that a mindfulness-based stress reduction program improved quality of life and reduced the number of seizure attacks in epilepsy patients, with effects persisting at follow-up.²⁴

These are not cures and should not replace medication, but they suggest that stress management can be a meaningful complement to standard treatment, particularly for people whose seizures are stress-sensitive. The evidence base is still small, and these interventions are unlikely to work the same way for everyone. But for someone who consistently notices seizures clustering around stressful periods, bringing up stress management with a neurologist is a reasonable conversation to have.

Vagus Nerve Stimulation and the Autonomic System

The autonomic nervous system, the part of your nervous system that controls heart rate, breathing, and digestion without conscious effort, plays a role in both stress responses and seizures. Studies have found that heart rate variability shifts toward increased sympathetic (fight-or-flight) activity before and during seizures.²⁵ In people with newly diagnosed temporal lobe epilepsy, researchers documented a progressive increase in sympathetic dominance leading into and during seizures, with only partial recovery afterward.²⁶

Vagus nerve stimulation, a therapy in which a small device sends electrical pulses to the vagus nerve to calm brain activity, may partly work by modulating this autonomic imbalance. In a study of people with temporal lobe epilepsy, transcutaneous vagus nerve stimulation altered cortisol dynamics during stress testing, dampening the typical drop in cortisol levels and changing salivary flow patterns.²⁷ Interestingly, people who do not respond to vagus nerve stimulation tend to show a distinct pattern of heart rate variability changes before seizures, suggesting a level of autonomic dysfunction that the device cannot overcome.²⁸

The Indirect Paths From Stress to Seizures

Beyond its direct hormonal effects on the brain, stress can provoke seizures through several roundabout routes that are easy to overlook. Stressed people sleep less, and sleep deprivation is itself a well-established seizure trigger. Stress can fuel anxiety and hyperventilation, which alters blood chemistry in ways that lower seizure thresholds. It can lead to increased alcohol use, another known risk factor. And it can undermine medication adherence. Research on caregivers of children with epilepsy has found that higher stress levels among parents are linked, albeit weakly, to worse medication self-management.²⁹ For the person with epilepsy, the same dynamic applies: being overwhelmed makes it easier to forget a dose, and a missed dose can lower the protection that keeps seizures at bay.

This web of indirect effects is part of why proving a direct causal link between stress and seizures is so hard. When someone under chronic stress has a breakthrough seizure, was it the cortisol acting on hippocampal neurons? The night of poor sleep? The missed evening dose of medication? The extra glass of wine? Often it is some combination, and the relative contribution of each factor is nearly impossible to isolate in a living person going about their day.

Wearables and Seizure Forecasting

Emerging technology may eventually help people with epilepsy understand their own stress-seizure relationship in real time. Wearable devices that continuously monitor heart rate, skin conductance, and movement patterns are being developed for seizure detection and, increasingly, for forecasting. Recent work has shown promising results for probabilistic seizure-risk forecasts based on data from long-term wearable devices and electronic seizure diaries, with potential predictive value found in individuals’ self-reported symptoms, mood, and cognitive performance.³⁰ If stress-related physiological markers like heart rate variability shifts or skin conductance spikes can be incorporated into these forecasting models, people might eventually receive warnings that their seizure risk is elevated on a given day, allowing them to take precautionary steps like avoiding known secondary triggers or ensuring they have taken their medication.