What Do Doctors Want You to Understand?

If you are still not sure whether your headaches are migraine at all, the migraine vs. tension-headache overview is the better place to start. This article is about what sets off an attack once you know you get them.

A migraine is not a normal headache with an on/off switch. It is a nervous-system attack that unfolds over hours to days.³ ⁶ By the time the pain arrives, the brain has usually been ramping up for a while — a phase doctors call the prodrome.⁶

That single fact changes almost everything about how physicians think about triggers.

If a "trigger" happens 30 minutes before your pain, it may have caused the attack. But if it happens two hours or two days before, the attack may have already been quietly starting — and the "trigger" was really an early symptom you did not recognize. This is the paradox at the center of migraine research: patients are usually right that something is going on before an attack, but wrong about which thing pushed the button.⁶

The clearest evidence supports a short list. In the largest systematic review of migraine precipitating factors, stress was reported by roughly 8 in 10 people with migraine, sleep changes by about 5 to 6 in 10, and dietary factors by about 4 in 10.¹ Other real triggers — hormonal changes,⁴ alcohol,² caffeine withdrawal,⁷ weather changes⁸ — sit behind those in the population evidence but can be the dominant driver for individual patients.

What is not well supported is the long, restrictive food list people are often handed. When researchers test specific foods in blinded provocation studies — where the person does not know if they are eating the suspected trigger — chocolate, cheese, and MSG mostly fail to trigger an attack.² The foods people are most confident about are, at a population level, some of the weakest.

The doctor's job here is not to hand you a longer list. It is to help you find the two or three things that reliably move your attacks, so the rest of your life can be a little less small.

How Do You Know If This Applies to You?

Here is a way to think about the ones the evidence supports.

Stress — and especially the drop in stress. Stress is the most commonly reported trigger of any single factor, cited by close to 80% of people with migraine in the largest systematic review.¹ But the pattern is subtler than "stress causes headache." A landmark study in Neurology tracked people with migraine day-to-day and found that a decrease in perceived stress from one evening to the next was linked to migraine onset in the following 6 to 24 hours, with odds of an attack about 1.5 to 1.9 times higher.⁵ This is the "weekend headache" or "let-down headache" — the migraine that shows up on Saturday morning after a hard work week. If your attacks land at the end of stretches, not during them, this is likely your pattern.

Sleep — too little, too much, or too changed. People with migraine consistently name poor sleep as a trigger,¹ and the biology backs that up: sleep and migraine share circuits in the hypothalamus and brainstem, and the two conditions run together at higher-than-chance rates.³ But sleep works in both directions. Sleep can end an attack, and yawning and unusual sleepiness in the hours before pain are often part of the prodrome rather than the cause.³ ⁶ The single most useful pattern to notice is change: shortened sleep on a busy night, an extra hour on the weekend, jet lag, a new baby, a night shift.

Missed meals, dehydration, and alcohol. These are among the best-supported dietary triggers. Fasting shows up as a trigger in about 44% of people with migraine, and alcohol in about 27%.² Red wine, in particular, is the alcoholic drink most consistently reported.² Dehydration is often reported alongside skipped meals — the underlying pattern is often the same busy day.

Hormonal changes. For women, the days around a menstrual period are one of the most reliable trigger windows. About 6% of women of reproductive age have "menstrual migraine" — attacks that cluster tightly around the period — and up to 70% of women with migraine notice at least some menstrual association.⁴ Perimenstrual attacks tend to be longer, more painful, and harder to treat than migraines at other times of the cycle.⁴ The likely mechanism is the sharp drop in estrogen just before menstruation.⁴

Weather. A large minority of people with migraine feel a weather pattern, most often around changes in barometric pressure.⁸ The evidence is inconsistent about direction — some are more sensitive to falling pressure, others to rising — and the effect appears to be about the change, not any absolute number.⁸ You cannot control the weather, but you can plan around a known-bad forecast.

Caffeine — up, down, or steady. This one is not what people expect. Regular moderate caffeine (3–4 cups of coffee a day) does not appear to trigger attacks for most people; abrupt withdrawal is the reliable trigger.⁷ In a small randomized trial, sudden caffeine cutoff triggered severe migraine in most participants.⁷ Caffeine can also treat an acute migraine, which is why it appears in some over-the-counter headache pills.⁷ The takeaway is not to quit caffeine cold turkey when trying to reduce triggers.

WHAT YOUR DOCTOR IS LOOKING FOR

Not a checklist, but a pattern. Specifically:

• The 24-hour picture around an attack, not the last thing you ate. A useful headache diary tracks sleep, meals, stress, mood, and cycle — not just food.⁵ ⁶

• Whether "triggers" show up in the same 6–12 hour window as the pain (candidate cause) or a day or two before (more likely prodrome).⁶

• Whether attacks cluster around the period, weekends, weather changes, or transitions like travel and holidays. Clusters are more useful than individual entries.⁴ ⁵

• Whether acute medication is being used more than 10 days a month — because at that point, the medication itself starts driving attacks (medication-overuse headache), and no amount of trigger avoidance will help until that is addressed.

WHAT CHANGES THE DECISION

Two people with the same reported triggers may need very different plans. What shifts it:

• How frequent the attacks are. Occasional attacks call for identifying and avoiding two or three high-yield personal triggers. Frequent attacks (roughly 4+ days a month) shift the conversation toward preventive medication rather than a longer avoidance list.

• Whether the "trigger" is really a prodrome. A craving for chocolate an hour before pain is almost certainly the migraine starting, not the food.⁶ Recognizing that keeps guilt (and unnecessary food restriction) out of the picture.

• Life stage. For women, hormonal patterns dominate in the reproductive years and often ease after menopause. That changes what to plan around.⁴

• What you can actually change. Skipping meals and sleep loss are among the biggest triggers, but they are also often the least negotiable — a new parent, a shift worker, or someone caring for a sick relative may not have great options. A doctor's plan should meet you where you are, not shame you for a pattern you cannot fix on your own.

What Should You Ask Your Doctor?

If migraine is a recurring problem, bring these to an appointment:

• Given how often I get attacks, is trigger avoidance the right main strategy, or should we talk about a preventive medicine?

• Am I using acute medication more than 10 days a month? Could medication-overuse headache be part of what is going on?

• Do my attacks cluster around my period, and if so, is a menstrual-migraine strategy right for me?⁴

• If I want to keep a headache diary, what should I track — and for how long — before we look at it together?

• Are any of the medicines or supplements I take (including hormonal contraception, decongestants, or over-the-counter painkillers) potentially adding to the picture?