If your headache throbs or pulses, hits one side of your head, makes you nauseous, and sends you hiding from light or noise, there’s a good chance it’s a migraine. Migraines are distinct from ordinary headaches in both how they feel and how long they last, typically between 4 and 72 hours. About 3.1 billion people worldwide deal with headache disorders, and migraine is among the most common, peaking between ages 35 and 45 and affecting women more often than men.
The Three-Question Self-Screen
A validated screening tool called the ID Migraine test uses just three yes-or-no questions to help identify migraine. It asks whether your headaches are accompanied by nausea, sensitivity to light, and enough disability that they interfere with your ability to work or function. Answering yes to two out of three correctly identifies migraine about 81% of the time. It’s not a diagnosis, but if you’re sitting here wondering whether what you’re feeling qualifies, those three features are the quickest way to gauge it.
What a Migraine Actually Feels Like
A migraine isn’t just a bad headache. The pain tends to pulse or throb rather than squeeze, and it usually favors one side of the head, though it can spread to both. Movement makes it worse. Walking up stairs, bending over, or even just shifting positions can ramp up the intensity. Most people also experience at least one of the following: nausea or vomiting, strong sensitivity to light, or strong sensitivity to sound. Some people also become sensitive to smells and touch.
For a clinical migraine diagnosis, doctors look for at least two pain characteristics (one-sided, pulsating, moderate to severe, worsened by movement) plus at least one accompanying symptom (nausea/vomiting or light and sound sensitivity). You also need to have had at least five attacks fitting this pattern. A single episode that matches perfectly might still be a migraine, but clinicians want a pattern before making it official.
The Four Phases of a Migraine Attack
Migraines often unfold in stages, and knowing them can help you recognize an attack before the pain even starts.
Prodrome
Hours or even a day or two before the headache, you might notice subtle warning signs: unusual fatigue, neck stiffness, food cravings, frequent yawning, mood changes like irritability or difficulty concentrating, or increased urination. These are easy to dismiss as a bad day, but they’re often the earliest signal that a migraine is building.
Aura
About 20 to 30% of people with migraine experience aura, a wave of neurological symptoms that typically develops over at least 5 minutes and lasts up to an hour (though in roughly 20% of cases it stretches longer). The most common form is visual: zigzag lines drifting across your field of vision, blind spots outlined by geometric shapes, shimmering lights, or brief flashes. Some people get tingling or numbness that creeps along one hand, up the arm, or across one side of the face. Less commonly, aura can affect speech, making it hard to find words or form sentences.
Headache
The main event lasts anywhere from several hours to three days. Beyond the throbbing head pain, this phase often brings nausea, anxiety, difficulty sleeping, and heightened sensitivity to light, sound, and smell. In children and teenagers, attacks can be shorter, sometimes lasting as little as two hours.
Postdrome
After the pain fades, many people feel washed out for hours or longer. Fatigue, body aches, dizziness, trouble concentrating, and lingering light sensitivity are all typical. Some describe it as a “migraine hangover.”
Migraine vs. Other Headache Types
Tension headaches are the most common headache type, and the easiest to confuse with a mild migraine. Tension headaches produce a steady, pressing tightness on both sides of the head, like a band squeezing your skull. They don’t throb, they rarely cause nausea, and physical activity doesn’t make them worse. If you can push through a workout without the pain escalating, it’s more likely tension than migraine.
Cluster headaches are rarer but unmistakable. They produce intense, piercing pain behind or around one eye, often with a drooping eyelid, tearing, or nasal congestion on the same side. They come in bursts lasting 15 minutes to three hours, often striking at the same time of day for weeks. Unlike migraine, where you want to lie still in a dark room, people with cluster headaches typically pace or rock because staying still feels unbearable.
What’s Happening in Your Brain
Migraine isn’t caused by blood vessels expanding in your head, despite what was believed for decades. The current understanding centers on a network of nerves called the trigeminovascular system. During an attack, intense brain activity triggers nerve fibers that wrap around blood vessels in the protective membranes surrounding your brain. Once activated, these nerve endings release signaling molecules that cause local inflammation and pain. One molecule in particular, a protein called CGRP, plays a central role. It’s so important to the migraine process that newer treatments work by blocking it directly.
Hormonal fluctuations help explain why migraine is more common in women, especially around menstruation, and why it often begins at puberty. Shifts in estrogen levels can lower the threshold for triggering an attack.
Warning Signs That It’s Not a Migraine
Most headaches, even severe ones, are not dangerous. But certain features suggest something other than migraine is going on, and these deserve prompt medical attention:
- Sudden, explosive onset. A headache that reaches maximum intensity within seconds, sometimes called a thunderclap headache, can signal a vascular emergency like an aneurysm.
- New neurological symptoms. Weakness in an arm or leg, new numbness, or vision changes that don’t fit your usual migraine pattern may point to a secondary cause.
- Fever or systemic illness. Headache with fever, night sweats, or weight loss suggests an underlying infection or inflammatory condition.
- First severe headache after age 50. New-onset headaches later in life are more likely to have a secondary cause.
- Headaches that keep getting worse. A clear pattern of increasing severity or frequency over weeks is a red flag.
- Position-dependent pain. A headache that dramatically changes when you stand up, lie down, or strain (coughing, bearing down) can indicate a pressure problem inside the skull.
- New headache during or after pregnancy. This warrants evaluation for vascular or hormonal complications.
If your headaches follow a familiar pattern, come and go over months or years, and match the throbbing, one-sided, nausea-and-light-sensitivity profile described above, migraine is the most likely explanation. Keeping a simple log of your attacks, including what you felt, how long it lasted, and what made it better or worse, gives any doctor you see the information they need to confirm the diagnosis quickly.