The Most Frequently Blamed Trigger: What Science Reveals About Alcohol and Headaches

Few triggers are as feared by people living with headaches as a simple glass of red wine. About one in five individuals with headache disorders believe that alcohol triggers their attacks, with red wine often considered the primary culprit.¹ However, when the available scientific evidence is examined, the relationship between alcohol and headaches proves to be far more complex—and more surprising—than conventional wisdom suggests.

The belief that alcohol triggers migraine has deep historical roots. In retrospective studies based on patients' recollections, between 20% and 40% of people with migraine identify alcoholic beverages as a trigger, with red wine consistently topping the list.² In one such study, nearly 78% of participants considered red wine a likely trigger, although it actually precipitated a migraine attack in fewer than 9% of cases.² This discrepancy between perception and reality provides the first indication that the relationship is not as straightforward as commonly believed.

Perhaps the most unexpected finding comes from a large meta-analysis that pooled data from 19 studies involving more than 126,000 participants. Rather than finding an increased risk, researchers observed the opposite: individuals who consumed alcohol had approximately a 1.5-fold lower risk of migraine than those who abstained.¹ At first glance, this might suggest a protective effect of alcohol. However, the most plausible explanation is reverse causation—people with migraine often avoid alcohol because they fear it will trigger an attack. In other words, alcohol is unlikely to protect against migraine; instead, migraine influences people to avoid alcohol.¹˒²

This interpretation is reinforced when comparing different study designs. In retrospective studies, where participants are asked to recall what they believe triggered their headaches, alcohol frequently emerges as a common culprit. In prospective studies, however, in which participants record alcohol intake and headache occurrence in real time using headache diaries, alcohol appears to play a much smaller role. In some studies, beer consumption was even associated with a lower likelihood of migraine attacks on subsequent days.² Human memory is inherently selective: it is easy to associate today's headache with yesterday's glass of wine while forgetting the many occasions when alcohol caused no symptoms. Unsurprisingly, the overall quality of evidence supporting alcohol as a migraine trigger is considered low.²

None of this suggests, however, that alcohol is harmless. Alcohol-induced headache is a well-recognized clinical condition that includes the classic hangover headache, which typically develops several hours after drinking—most often the following morning, when alcohol has already been eliminated from the body.² Dose also matters. While one or two standard drinks are generally not associated with headache, consuming five or more substantially increases the risk.² Dark-colored alcoholic beverages, such as red wine and whiskey, contain higher concentrations of fermentation by-products known as congeners and are more likely to provoke headaches than clear spirits such as gin or vodka. In the specific case of red wine, researchers have proposed that several compounds other than ethanol—including histamine, tyramine, sulfites, and flavonoids—may contribute to headache by promoting vasodilation, neurogenic inflammation, and the release of calcitonin gene-related peptide (CGRP), a key mediator in the current understanding of migraine pathophysiology.²

It is also important to recognize that not all headaches are the same. For tension-type headache—the most common headache disorder in the general population—the same meta-analysis found no association between alcohol consumption and headache risk.¹ Cluster headache, on the other hand, has long been recognized as highly sensitive to alcohol during active cluster periods. Nevertheless, the limited number of high-quality studies available has produced conflicting findings, preventing definitive conclusions.¹˒²

The most reasonable approach, therefore, is an individualized one. Rather than recommending blanket alcohol avoidance, headache specialists often encourage patients to keep a headache diary, which can help distinguish true triggers from coincidental associations and enable more predictable symptom management.² Individuals with frequent migraine attacks and suspected histamine intolerance may benefit from avoiding alcohol altogether. Conversely, those with infrequent attacks may, under medical guidance, identify which beverages and what quantities—if any—provoke their symptoms, without allowing fear of headaches to unnecessarily restrict their lives. Nevertheless, it is important to emphasize that the World Health Organization (WHO) maintains that there is no safe level of alcohol consumption, given its established associations with cancer, injuries, and numerous other adverse health outcomes. For people living with recurrent headaches, reducing alcohol consumption may therefore provide benefits that extend well beyond migraine prevention.²

References:

1. Błaszczyk, B., Straburzyński, M., Więckiewicz, M., Budrewicz, S., Niemiec, P., Staszkiewicz, M., & Waliszewska-Prosół, M. (2023). Relationship between alcohol and primary headaches: a systematic review and meta-analysis. The Journal of Headache and Pain, 24(1), 116. https://doi.org/10.1186/s10194-023-01653-7
2. Zduńska, A., Cegielska, J., Zduński, S., & Domitrz, I. (2025). Migraine and Alcohol—Is It Really That Harmful? Nutrients, 17(22), 3620. https://doi.org/10.3390/nu17223620