Migraine attacks can sometimes seem to appear without warning.
You may feel fine one day and wake the next with throbbing head pain, nausea and extreme sensitivity to light or sound.
Naturally, this can leave you wondering:
What triggered my migraine?
The answer is not always simple.
Stress, hormonal changes, disrupted sleep, missed meals, dehydration, alcohol, bright lights, strong smells and weather changes are among the factors associated with migraine attacks in some people.
But there is no universal list of triggers that applies to everyone with migraine.
Something that consistently contributes to attacks in one person may have absolutely no effect on another.
Even more importantly, what appears to be a trigger can sometimes actually be an early symptom of the migraine attack itself.
Understanding this difference can prevent unnecessary restrictions and help you identify the patterns that genuinely matter to you.
What Is Migraine?
Migraine is a neurological disorder characterised by recurring attacks.
It is much more than simply “a bad headache.”
According to the World Health Organization, migraine is one of the world's most disabling neurological conditions.
A migraine attack can involve:
- moderate to severe headache
- throbbing or pulsating pain
- pain that may affect one side of the head
- nausea
- vomiting
- sensitivity to light
- sensitivity to sound
- sensitivity to smells.
Physical activity may make the headache worse.
An untreated migraine attack commonly lasts between 4 and 72 hours, although individual experiences vary.
Some people also experience migraine aura, which can cause temporary neurological symptoms such as visual disturbances, tingling or other sensory changes.
Not everyone with migraine experiences aura.
What Is a Migraine Trigger?
A migraine trigger is a factor that appears to increase the likelihood of an attack in a person who is susceptible to migraine.
However, migraine does not always operate according to a simple:
Trigger → Migraine
pattern.
Instead, specialists increasingly describe a migraine threshold.
Imagine that your brain has a threshold for developing an attack.
One night of poor sleep might not be enough to cross that threshold.
But combine poor sleep with:
- dehydration
- a skipped lunch
- significant stress
- hormonal changes
and an attack may become more likely.
This helps explain why something can appear to trigger a migraine on one occasion but cause no problem at another time.
Several contributing factors may have accumulated.
Here are 10 commonly reported migraine triggers and contributing factors worth understanding.
1. Stress
Stress is one of the most commonly reported factors associated with migraine attacks.
Potential sources include:
- work pressure
- financial worries
- relationship problems
- caregiving
- major life events
- anxiety
- lack of rest.
Interestingly, an attack does not always occur during the most stressful moment.
Some people experience what is sometimes called a “let-down” migraine after the stressful period ends.
For example, someone might cope with an extremely demanding week and then develop migraine at the weekend when they finally relax.
You cannot eliminate all stress from life.
Instead, concentrate on healthier ways of managing it.
Depending on what works for you, this could include:
- regular physical activity
- relaxation exercises
- mindfulness
- adequate sleep
- taking regular breaks
- counselling or psychological support
- enjoyable hobbies
- spending time with supportive people.
Stress management should complement appropriate migraine treatment rather than replace it.
2. Too Little—or Too Much—Sleep
Migraine brains can be sensitive to changes in routine.
That includes sleep.
Potential problems include:
- sleep deprivation
- staying awake unusually late
- sleeping much longer than usual
- jet lag
- shift-work disruption
- inconsistent sleep schedules.
Try to maintain reasonably consistent sleeping and waking times, including at weekends when practical.
Quality also matters.
If you have persistent insomnia, loud snoring, pauses in breathing during sleep or severe daytime sleepiness, discuss this with a healthcare professional.
Another sleep disorder could be contributing to your headaches.
3. Skipping Meals
The old KandyWandy article concentrated heavily on individual foods.
But for many people with migraine, not eating may be more important than a particular food.
Skipping breakfast, delaying lunch for several hours or fasting unexpectedly can contribute to attacks in susceptible people.
Try to maintain a reasonably regular meal pattern.
If your schedule makes this difficult, planning meals or keeping an appropriate snack available can help.
A balanced diet is generally preferable to eliminating numerous nutritious foods because they appear on an internet “migraine trigger” list.
4. Dehydration
Not drinking enough fluid can contribute to headaches and may trigger migraine attacks in susceptible individuals.
Fluid requirements differ according to:
- body size
- climate
- activity level
- pregnancy
- diet
- medical conditions.
Rather than following an arbitrary amount that applies to everyone, drink regularly and pay additional attention to hydration during hot weather, exercise or illness.
People who have been advised to restrict fluids because of heart, kidney or another medical condition should follow their healthcare professional's advice.
5. Hormonal Changes
Migraine is more common in women than men, and reproductive hormones can influence attacks.
Some women notice migraine attacks:
- shortly before menstruation
- during menstruation
- at other times of hormonal fluctuation.
Changes in oestrogen appear to play an important role.
Migraine patterns can also change during:
- pregnancy
- perimenopause
- menopause
- use of hormonal contraception
- hormone therapy.
Some women improve during particular hormonal stages while others experience worsening attacks.
Keeping both a headache diary and menstrual-cycle record can help reveal whether there is a consistent pattern.
Women with migraine with aura should discuss appropriate contraceptive choices with a healthcare professional because some oestrogen-containing contraceptives may not be appropriate depending on individual circumstances and cardiovascular risk.
6. Caffeine—and Changes in Caffeine Intake
Caffeine is particularly interesting because it can potentially work in both directions.
For some people, caffeine may help relieve migraine and is even included in certain headache medicines.
For others:
- excessive caffeine
- suddenly consuming much more than usual
- abruptly stopping regular caffeine
may contribute to headache or migraine.
Consistency may therefore be more important than assuming coffee must automatically be eliminated.
If you consume substantial amounts of caffeine and want to reduce your intake, gradual reduction may help minimise withdrawal headaches.
Remember that caffeine is found in more than coffee.
Sources can include:
- tea
- energy drinks
- cola
- chocolate
- some medicines.
Track your own response rather than assuming caffeine affects everyone identically.
7. Alcohol
Alcohol is a commonly reported migraine trigger.
Red wine is frequently mentioned, but other alcoholic beverages can also be associated with attacks.
The response varies considerably.
Some people notice a strong and consistent association, while others do not.
Alcohol can also contribute indirectly through:
- dehydration
- disrupted sleep
- changes in meal patterns.
If you repeatedly develop migraine after drinking a particular alcoholic beverage, reducing or avoiding it may be worthwhile.
You do not need to repeatedly expose yourself to something that reliably produces an attack simply to prove that it is a trigger.
8. Bright or Flashing Lights
Some people with migraine are particularly sensitive to visual stimulation.
Possible environmental factors include:
- very bright sunlight
- flashing lights
- glare
- flickering screens
- certain artificial lighting.
However, there is an important complication.
Sensitivity to light can itself be an early migraine symptom.
This means someone might enter a brightly lit shop, suddenly find the lighting unbearable and conclude that the lights caused their migraine.
In reality, the migraine process may already have begun, making the brain unusually sensitive to light.
Tracking the timing of symptoms can help distinguish the two possibilities.
Appropriate sunglasses outdoors, screen breaks and adjusting uncomfortable lighting may help some people.
Avoid wearing very dark sunglasses continuously indoors unless medically advised, because excessive avoidance of ordinary light may potentially increase light sensitivity.
9. Strong Smells
Strong odours are frequently reported by people with migraine.
Examples may include:
- perfume
- cigarette smoke
- paint fumes
- cleaning chemicals
- fuel
- other intense odours.
Again, smell sensitivity—called osmophobia—can also occur as part of a migraine attack.
If a particular smell repeatedly precedes your attacks, reducing exposure where reasonably possible may help.
But attempting to eliminate every smell from your environment is neither practical nor necessary.
10. Weather and Environmental Changes
Some people report attacks associated with:
- changes in barometric pressure
- very hot weather
- high humidity
- storms
- rapid temperature changes
- altitude changes.
Weather is obviously not something you can control.
If you notice a consistent pattern, the goal should not be to worry whenever the forecast changes.
Instead, pay extra attention to the factors you can control on potentially vulnerable days.
For example:
- stay hydrated
- eat regularly
- maintain your sleep schedule
- have your prescribed acute migraine treatment available.
Are Certain Foods Really Migraine Triggers?
This deserves special attention because migraine diets have historically been extremely restrictive.
The original version of this article advised avoiding a long list including:
- broad beans
- lima beans
- sour cream
- fermented foods
- chocolate
- nuts
- peanut butter
- figs
- raisins
- papaya
- avocado
- plums
- peas
- citrus fruit
- aged cheeses
- sourdough bread.
We should not continue presenting that list as though these foods routinely cause migraine.
There is no universal migraine-trigger diet.
The American Migraine Foundation specifically notes that food triggers vary between individuals.
Some people report associations with foods or ingredients such as:
- aged cheeses
- processed meats
- alcohol
- caffeine
- MSG
- certain other individual foods.
But that does not mean everybody with migraine needs to eliminate them.
Chocolate Is a Good Example of Why Trigger Identification Can Be Difficult
For decades, chocolate has been widely described as a migraine trigger.
But there is another possibility.
Food cravings can occur during the prodrome phase of migraine.
Prodrome is the early stage of an attack and can begin hours or even a day or two before the headache.
A person might suddenly crave chocolate, eat some and then develop headache several hours later.
It seems logical to conclude:
“Chocolate caused my migraine.”
But the craving itself may have been an early symptom indicating that the migraine process had already begun.
This illustrates why a single episode is usually not enough to identify a trigger confidently.
What Are the Early Warning Signs of Migraine?
Before headache develops, some people experience prodrome symptoms such as:
- mood changes
- unusual tiredness
- food cravings
- neck stiffness
- frequent yawning
- difficulty concentrating
- increased urination.
Some people then develop an aura before or during the attack.
Aura can involve temporary symptoms such as:
- flashing lights
- zigzag patterns
- blind spots
- tingling
- numbness
- speech difficulties.
Not everyone experiences prodrome or aura.
Recognising your own early symptoms can help you distinguish them from actual triggers and may allow you to use prescribed acute treatment at the appropriate time.
How to Identify Your Personal Migraine Triggers
One of the most useful tools is a migraine diary.
Record information such as:
- date and time of each attack
- headache severity
- how long it lasted
- sleep the previous night
- meals
- hydration
- caffeine
- alcohol
- stress level
- menstrual cycle where relevant
- weather changes
- medicines taken
- possible early migraine symptoms.
Look for repeated patterns, rather than blaming something that happened once.
For example, if you drank coffee before one attack, that does not establish coffee as your trigger.
If attacks repeatedly occur after a particular change under similar circumstances, the association becomes more meaningful.
Don't Try to Avoid Everything
Trigger awareness can become counterproductive when someone begins fearing ordinary activities and foods.
You may find enormous online lists telling you to avoid:
- chocolate
- cheese
- fruit
- bread
- nuts
- exercise
- sunlight
- coffee
- countless other things.
Trying to eliminate all of them can make everyday life unnecessarily restrictive.
A better strategy is to identify your own reproducible patterns while maintaining a stable, healthy routine.
The American Migraine Foundation's current threshold approach is particularly useful: attacks can occur when several factors accumulate rather than because of one forbidden food.
Lifestyle Habits That May Help Reduce Migraine Attacks
A consistent routine can help some people reduce their vulnerability to migraine.
Useful habits include:
- maintaining regular sleep
- eating regular balanced meals
- staying appropriately hydrated
- exercising regularly
- managing stress
- keeping caffeine intake reasonably consistent
- limiting known personal triggers
- following your prescribed treatment plan.
Lifestyle management is important, but migraine is a neurological disorder.
Someone who continues experiencing frequent or disabling attacks should not be told simply to “avoid stress and drink water.”
Effective acute and preventive treatments are available.
When Should You See a Healthcare Professional About Migraine?
Arrange medical assessment if:
- headaches are frequent
- attacks are becoming more severe
- headaches interfere significantly with work, school or everyday activities
- your headache pattern has changed substantially
- over-the-counter medicines are no longer effective
- you require pain medicine very frequently
- you are unsure whether your headaches are migraine
- migraine symptoms are significantly affecting your quality of life.
Frequent use of acute headache medicines can sometimes contribute to medication-overuse headache, creating an additional cycle of headaches.
A healthcare professional can determine whether preventive migraine treatment may be appropriate.
When Is a Headache an Emergency?
Most headaches are not caused by dangerous conditions.
However, certain symptoms require urgent medical assessment.
Seek emergency medical care for:
- a sudden, extremely severe headache that reaches maximum intensity rapidly
- headache after a significant head injury
- headache accompanied by new paralysis or marked weakness
- new difficulty speaking or understanding speech
- loss of consciousness
- seizure
- severe confusion
- headache with fever and significant neck stiffness
- sudden significant vision loss
- a severe new headache during pregnancy or shortly after childbirth.
New neurological symptoms should not automatically be assumed to be migraine aura, particularly if you have never experienced them before.
Contact your local emergency medical service when symptoms could indicate a serious neurological emergency such as stroke.
The Bottom Line
Migraine triggers are real, but they are also highly individual.
Stress, disrupted sleep, missed meals, dehydration, hormonal changes, caffeine fluctuations, alcohol, bright lights, strong smells and weather changes are commonly reported factors.
But you do not need to avoid every food or activity that appears on an internet migraine list.
Migraine attacks often occur when several contributing factors accumulate and push a susceptible brain beyond its migraine threshold.
Keeping a migraine diary can help identify your own patterns.
At the same time, remember that food cravings, neck stiffness, tiredness and sensitivity to light or smells can sometimes be early symptoms of an attack rather than its cause.
The goal is not to build your life around avoiding migraine.
It is to understand your condition, maintain a stable healthy routine, identify meaningful personal patterns and obtain effective treatment when needed.
Medical Disclaimer
This article provides general educational information and is not a substitute for personalised medical diagnosis or treatment. Migraine symptoms and triggers vary considerably between individuals. Speak with an appropriately qualified healthcare professional if headaches are frequent, severe, changing or affecting your daily life. Seek urgent medical care for a sudden severe headache or headache accompanied by serious new neurological symptoms.
Sources and Further Reading
World Health Organization — Migraine and Other Headache Disorders
https://www.who.int/news-room/fact-sheets/detail/headache-disorders
American Migraine Foundation — Migraine Attacks Are Not Random: Understanding the Threshold Concept
https://americanmigrainefoundation.org/resource-library/migraine-attacks-are-not-random-understanding-the-threshold-concept/
American Migraine Foundation — Managing Diet and Migraine
https://americanmigrainefoundation.org/resource-library/managing-diet-and-migraine/
American Migraine Foundation — Stress and Migraine
https://americanmigrainefoundation.org/resource-library/stress-migraine/
Mayo Clinic — Migraine: Symptoms and Causes
https://www.mayoclinic.org/diseases-conditions/migraine-headache/symptoms-causes/syc-20360201
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