A migraine is technically a type of headache disorder, but calling it “just a headache” is like calling a hurricane “just some wind.” Migraine is a complex neurological condition that involves far more than head pain. It can last 4 to 72 hours untreated, unfolds in up to four distinct phases, and produces symptoms throughout the body, including nausea, visual disturbances, and extreme sensitivity to light and sound. Some migraines don’t even involve head pain at all.
What Makes Migraine Different From a Regular Headache
The most common “regular” headache is a tension-type headache. It produces mild to moderate pain that feels like a tight band around your head, sometimes spreading to your upper back and neck. It’s unpleasant, but it doesn’t usually stop you from going about your day.
Migraine pain is a different experience. It’s moderate to severe, often throbbing or pulsating, and typically concentrated on one side of the head (though it can affect both sides or switch between episodes). Physical activity makes it worse. Walking up stairs, bending over, even turning your head can intensify the pain. That’s why people mid-migraine instinctively retreat to a dark, quiet room.
But the pain itself isn’t even what separates migraine most clearly. It’s everything else that comes with it. Nausea is the most common migraine symptom after head pain. Sensitivity to light and sound can become so intense that normal indoor lighting or a conversation across the room feels unbearable. Some people also become sensitive to smell and touch. Tension headaches don’t produce these symptoms.
The Four Phases of a Migraine Attack
A migraine isn’t a single event. It can progress through four stages, though not everyone experiences all of them.
Prodrome begins one or two days before the head pain. You might notice food cravings, neck stiffness, mood swings, frequent yawning, increased thirst, or constipation. These early warning signs are easy to dismiss, but many people learn to recognize them as signals that an attack is coming.
Aura affects roughly a quarter of people with migraine. It usually starts gradually, builds over several minutes, and lasts 20 minutes to an hour. The most common form is visual: flashing lights, bright spots, zigzag lines, or expanding blind spots. But aura can also cause pins-and-needles sensations in an arm or leg, numbness on one side of the face, difficulty speaking, or even hearing sounds that aren’t there.
The attack phase is the headache itself, lasting anywhere from 4 to 72 hours without treatment. In children, it can be shorter, sometimes lasting as little as two hours. During this phase, the throbbing pain, nausea, and sensory sensitivity are at their peak.
Postdrome follows the pain and can linger for up to a day. Most people describe feeling drained, confused, or washed out. Some feel oddly elated. Sudden head movements can briefly bring back the pain. This “migraine hangover” is something tension headache sufferers never deal with.
Why Migraine Is a Neurological Condition
Tension headaches involve muscle tightness and pain signaling. Migraine involves something fundamentally different happening in the brain.
The process centers on a network of nerves and blood vessels connecting the brain’s outer covering (the meninges) to the brainstem. When this system activates, nerve endings release a signaling molecule called CGRP. That molecule triggers a cascade of inflammation around blood vessels in the brain, which sensitizes pain receptors and produces the intense, throbbing pain characteristic of migraine. CGRP levels rise during a migraine attack and drop after successful treatment, confirming its central role.
The aura phase has its own distinct mechanism. A slow wave of electrical activity spreads across the brain’s surface at a rate of about 3 to 5 millimeters per minute. This wave briefly excites neurons, then suppresses them. As it moves across the visual processing area of the brain, it produces the expanding visual disturbances people see during aura. When it crosses areas responsible for sensation or speech, it causes tingling, numbness, or difficulty finding words. This wave is also thought to trigger the pain phase that follows, by activating the nerve pathways described above.
This is why migraine responds to entirely different medications than regular headaches. Over-the-counter painkillers can take the edge off, but medications designed specifically for migraine target the CGRP pathway or the nerve receptors involved in the attack. These migraine-specific treatments are generally more effective than standard pain relievers because they address the underlying neurological process rather than just dulling the pain signal.
Migraines That Don’t Involve Head Pain
Here’s something that surprises most people: you can have a migraine with no headache at all. This is formally classified as “typical aura without headache,” sometimes called a silent migraine. You experience the visual disturbances, the tingling, or the other aura symptoms, but the head pain never follows. The International Headache Society recognizes this as a distinct migraine subtype. It’s more common in people who have had migraine with aura for years and find that, over time, the headache phase fades while the aura persists.
The existence of silent migraine underscores why migraine isn’t simply a headache. The headache is one possible symptom of a broader neurological event. Pain happens to be the most prominent feature for most people, but the brain changes driving the condition can produce a wide range of symptoms independently.
How Doctors Distinguish Migraine From Other Headaches
There’s no blood test or brain scan that diagnoses migraine. Diagnosis is based on your symptom pattern. The International Headache Society requires at least five attacks that each meet specific criteria: the pain lasts 4 to 72 hours, has at least two defining characteristics (one-sided location, pulsating quality, moderate to severe intensity, or worsened by routine physical activity), and is accompanied by either nausea/vomiting or sensitivity to both light and sound.
If you’re unsure whether what you’re experiencing is a regular headache or migraine, the most telling clues are nausea, light sensitivity, and whether movement makes it worse. A headache that sends you to bed in a dark room is behaving very differently from one you can push through with some ibuprofen. Tracking your attacks, including what you feel before, during, and after, gives you and your doctor the clearest picture of what’s going on.