Does Caffeine Cause Migraines? What the Latest Research Really Says

Does Caffeine Cause Migraines? The Science Says It's More Complicated Than You Think

For millions of people, the day doesn't truly begin until the first cup of coffee.

But if you're someone who experiences migraines, you've probably heard conflicting advice about caffeine.

Some people swear that coffee triggers their migraines.

Others reach for a caffeinated beverage the moment a headache starts because it helps relieve the pain.

So which is it?

Does caffeine cause migraines—or can it actually help prevent them?

According to the latest scientific evidence, the answer isn't as simple as "yes" or "no."

A comprehensive review published in Nutrients examined decades of research on caffeine and migraine and found that the relationship depends on several factors, including how much caffeine you consume, how consistently you consume it, and how sensitive you are as an individual. In many cases, moderate, consistent caffeine intake does not appear to increase migraine risk, while large doses or sudden caffeine withdrawal are much more likely to trigger headaches.

Let's take a closer look at what the science actually says.

What Is a Migraine?

A migraine isn't "just a bad headache."

It's a complex neurological condition that can involve:

• Moderate to severe head pain
• Nausea
• Vomiting
• Sensitivity to light
• Sensitivity to sound
• Visual disturbances (known as aura)
• Dizziness
• Difficulty concentrating

Migraine affects roughly 15% of the global population, making it one of the most common neurological disorders worldwide. Women are affected approximately three times more often than men.

Because migraines can last anywhere from several hours to multiple days, many sufferers try to identify potential triggers—including caffeine.

Why Has Caffeine Been Blamed?

Caffeine affects several systems involved in migraine.

Most notably, it blocks adenosine receptors in the brain.

Adenosine is a naturally occurring molecule that helps regulate:

• Sleep
• Blood vessel function
• Pain signaling
• Brain activity

During a migraine attack, adenosine levels often increase.

By blocking adenosine receptors, caffeine may temporarily reduce pain signaling and constrict dilated blood vessels, which is one reason it's included in several over-the-counter headache medications.

But the same mechanism that helps relieve headaches can also create problems when caffeine intake becomes excessive—or suddenly stops.

Can Caffeine Actually Help Migraines?

Yes.

In fact, caffeine has been used as a headache treatment for decades.

Several studies suggest caffeine can:

• Improve absorption of certain pain medications
• Increase pain-relieving effects
• Help relieve acute migraine symptoms in some people

That's why you'll often see caffeine combined with acetaminophen or aspirin in headache medications.

However, this doesn't necessarily mean drinking more coffee is always beneficial.

Timing and consistency matter.

Does Coffee Increase Migraine Risk?

Surprisingly, most evidence suggests moderate coffee consumption is not associated with a higher overall risk of migraine.

The review evaluated numerous observational studies involving thousands of participants.

Overall, researchers found that regular intake equivalent to roughly one to four cups of coffee per day generally wasn't linked to increased migraine frequency in most people.

This challenges the common belief that everyone with migraines should avoid caffeine completely.

When Caffeine May Become a Problem

Although moderate intake appears safe for many people, higher doses tell a different story.

One study found that consuming three or more caffeinated beverages in a single day was associated with a greater likelihood of experiencing a migraine that same day among individuals prone to migraines.

Interestingly, consuming one or two caffeinated beverages did not significantly increase risk.

This suggests there may be a threshold beyond which caffeine becomes problematic for susceptible individuals.

The Hidden Trigger: Caffeine Withdrawal

Ironically, caffeine itself often isn't the problem.

Stopping caffeine suddenly may be.

Habitual caffeine users develop a degree of physiological dependence.

If someone who normally drinks coffee every morning suddenly skips it, they may experience:

• Headache
• Fatigue
• Difficulty concentrating
• Irritability

These withdrawal headaches can begin within 12–24 hours and sometimes resemble migraine attacks.

Many so-called "weekend migraines" occur because people sleep in and delay their usual morning coffee.

The culprit isn't drinking coffee.

It's not drinking coffee at the expected time.

Genetics May Play a Role

One of the most interesting findings from the review came from Mendelian randomization studies.

These studies use naturally occurring genetic differences to explore cause-and-effect relationships.

Several analyses suggested that individuals genetically predisposed to drinking more coffee actually had a lower lifetime risk of migraine, particularly migraine with aura.

Does that mean everyone should start drinking more coffee?

Not necessarily.

These studies identify long-term associations rather than recommending a specific amount of caffeine.

Still, they suggest the relationship between caffeine and migraine is much more nuanced than previously believed.

Why Do People Respond So Differently?

If caffeine affects everyone differently, why?

Researchers believe several factors contribute:

• Genetics
• Habitual caffeine intake
• Sleep quality
• Stress levels
• Hormonal fluctuations
• Individual sensitivity to adenosine

Some people can drink multiple cups of coffee daily without issue.

Others develop migraines after a single energy drink.

There's no universal threshold that applies to everyone.

Should People with Migraines Quit Caffeine?

For most people, probably not.

Current evidence doesn't support recommending complete caffeine avoidance for everyone with migraines.

Instead, experts generally encourage:

• Moderate intake
• Consistent daily consumption
• Avoiding binge caffeine use
• Avoiding sudden withdrawal

In other words, consistency appears more important than complete avoidance.

Practical Tips for Managing Caffeine and Migraines

If you experience migraines, consider these science-backed strategies.

Keep Your Intake Consistent

Try to consume roughly the same amount of caffeine at similar times each day.

Large day-to-day swings may increase headache risk.

Avoid High Caffeine Days

Drinking five coffees one day and none the next is more likely to create problems than moderate, consistent intake.

Don't Quit Cold Turkey

If you decide to reduce caffeine, taper gradually over several days or weeks.

This minimizes withdrawal headaches.

Pay Attention to Your Personal Triggers

Migraine triggers vary enormously.

Keeping a headache diary can help identify whether caffeine truly affects you.

Consider Total Lifestyle Factors

Poor sleep, dehydration, stress, skipped meals, hormonal changes, and illness often interact with caffeine rather than acting independently.

Looking at the bigger picture is usually more helpful than blaming a single cup of coffee.

The Bottom Line

For years, caffeine has been viewed as both a friend and a foe for people living with migraines.

The latest scientific evidence suggests both perspectives contain some truth.

Moderate, consistent caffeine intake does not appear to increase migraine risk for most people.

However, large acute doses and sudden caffeine withdrawal may trigger headaches in susceptible individuals.

Perhaps the biggest takeaway is that caffeine isn't inherently good or bad.

Its effects depend on dose, consistency, genetics, and individual sensitivity.

Rather than eliminating coffee altogether, many migraine sufferers may benefit most from maintaining a predictable caffeine routine and avoiding dramatic fluctuations in intake.

As with many areas of nutrition, consistency often beats extremes.

References

1. Nutrients. Coffee, Caffeine, and Migraine: A Narrative Review. 2025.
2. Fredholm BB, et al. Actions of caffeine in the brain with special reference to factors that contribute to its widespread use. Pharmacological Reviews. 1999.
3. Lipton RB, et al. Prospective cohort study of acute caffeinated beverage consumption and risk of migraine occurrence. American Journal of Medicine. 2019.
4. Juliano LM, Griffiths RR. A critical review of caffeine withdrawal. Psychopharmacology. 2004.
5. Mendelian randomization analyses summarized in Coffee, Caffeine, and Migraine: A Narrative Review. Nutrients. 2025.