A migraine is a neurological event that unfolds in distinct phases and involves the entire nervous system, while a regular headache is primarily a pain experience without the broader neurological disruption. The most common type of everyday headache, the tension headache, produces a dull, pressing sensation on both sides of the head. A migraine, by contrast, typically brings throbbing pain, sensory sensitivity, nausea, and sometimes visual disturbances that can last anywhere from four hours to three days.
What Happens in Your Brain During a Migraine
A tension headache involves muscle tightness and pain signaling, but the underlying brain activity stays relatively normal. A migraine is fundamentally different. It involves a phenomenon called cortical spreading depression: a slow wave of intense electrical activity that rolls across the surface of the brain, followed by a period of suppressed activity. This wave disrupts normal brain function and is responsible for many of the strange symptoms, like visual disturbances and difficulty thinking, that distinguish migraines from ordinary headaches.
During this process, the brain releases a signaling molecule called CGRP in a cascade that sensitizes pain pathways in the head and face. CGRP dilates blood vessels in the membranes surrounding the brain and amplifies pain transmission through the trigeminal nerve, which is the major pain nerve of the head. This is why migraine pain feels so different from a tension headache: it’s being driven by a neurological chain reaction, not just muscle tension or stress.
How the Pain Feels Different
Tension headaches typically produce a steady, band-like pressure around the forehead or the back of the head. The pain is bilateral (both sides), mild to moderate, and doesn’t usually get worse with physical activity.
Migraine pain is throbbing or pulsating in about 85 percent of episodes. It’s one-sided in roughly 60 percent of cases, though 40 percent of people do experience pain on both sides, which can make it harder to distinguish from a tension headache based on location alone. A key differentiator: migraine pain worsens with routine physical activity like walking up stairs or bending over. Even turning your head can intensify it.
The Symptoms Beyond Pain
This is where the distinction becomes clearest. Tension headaches are essentially just pain. Migraines come with a constellation of neurological symptoms that a tension headache simply doesn’t produce.
About 69 percent of migraine patients experience significant light sensitivity, and many also develop sound sensitivity and skin sensitivity (where normal touch on the face or scalp feels painful). Nausea is common, and vomiting occurs in a substantial portion of attacks. These aren’t minor side effects. For many people, the light and sound sensitivity is so intense that they need to lie in a dark, quiet room until the attack passes.
Roughly one in four migraine sufferers also experiences aura, usually visual. This can include shimmering zigzag lines, blind spots, or flashing lights that develop over five to twenty minutes before the headache phase begins. Some people get tingling or numbness in their face or hands, or temporary difficulty finding words. None of these symptoms occur with tension headaches.
Migraines Unfold in Phases
Unlike a tension headache, which tends to come on gradually and fade, a migraine attack has up to four distinct phases that can stretch over a day or more.
- Prodrome: Hours or even a day before the pain starts, you may notice mood changes, unusual food cravings, excessive yawning, frequent urination, neck stiffness, or fatigue. These warning signs are surprisingly specific to migraine and don’t occur with other headache types.
- Aura: Visual disturbances, tingling, or speech difficulty lasting five to sixty minutes. Not everyone gets this phase.
- Headache: The main pain phase, lasting four to seventy-two hours, with accompanying nausea, light sensitivity, and sound sensitivity.
- Postdrome: After the pain resolves, many people feel drained, foggy, and achy for hours or another full day. This “migraine hangover” includes fatigue, trouble concentrating, dizziness, and lingering light sensitivity.
Recognizing the prodrome phase is valuable because treating a migraine early, before the pain becomes severe, is significantly more effective than waiting.
Different Triggers
Tension headaches are most often triggered by stress, poor posture, or eye strain. Migraine triggers overlap somewhat but also include factors that don’t typically cause tension headaches: hormonal changes (especially around menstruation), changes in weather or barometric pressure, missed meals, disrupted sleep patterns, and dehydration. Caffeine, alcohol, and tobacco can increase migraine frequency in people who are susceptible.
Hormonal shifts are a particularly important trigger. Women with a history of migraines often notice changes in their headache pattern during pregnancy, around their menstrual cycle, or when starting or stopping hormonal birth control. This hormonal connection helps explain why migraines are roughly three times more common in women than men.
Treatment Is Different Too
A tension headache usually responds well to over-the-counter pain relievers like ibuprofen or acetaminophen. Migraines can sometimes respond to these medications too, particularly mild to moderate attacks treated early. But moderate and severe migraines often require migraine-specific treatments.
Triptans are the most established class of migraine-specific medication. They work by targeting the serotonin receptors involved in the migraine process, constricting dilated blood vessels and blocking pain transmission. When standard pain relievers aren’t enough, triptans are the next step. Interestingly, comparison studies show some nuance: high-dose ibuprofen performed comparably to lower-dose triptans, and a combination of aspirin, acetaminophen, and caffeine actually outperformed some triptan formulations. But for consistent, reliable relief of severe attacks, the stronger triptans remain superior.
Newer medications target CGRP, the signaling molecule that drives the neurological cascade. These work differently from triptans and are available both as acute treatments and as preventive therapies taken regularly to reduce the frequency of attacks. Preventive treatment is generally considered when migraines occur frequently enough to significantly affect daily life.
One important caution applies to both migraines and tension headaches: overusing acute medications can cause rebound headaches. For triptans and combination painkillers, using them more than ten days per month for three months or longer can actually increase headache frequency. For simple painkillers like ibuprofen alone, the threshold is about fifteen days per month.
The Global Burden of Migraine
Migraine is the third leading cause of disability worldwide among all neurological conditions, behind only stroke and neonatal brain injury. Roughly 40 percent of the global population experiences headache disorders, and migraine accounts for a disproportionate share of lost productivity, impaired quality of life, and financial strain. The impact extends beyond missed workdays: chronic migraine can affect relationships, career advancement, and mental health over time.
When a Headache Signals Something More Serious
Both migraines and tension headaches are “primary” headache disorders, meaning they aren’t caused by another underlying condition. But certain headache features should raise concern about a “secondary” headache caused by something dangerous like a bleed, infection, or tumor. Red flags include a sudden, explosive headache that reaches maximum intensity within seconds (a “thunderclap” headache), headaches accompanied by fever or unexplained weight loss, new headaches starting after age 50, headaches with neurological signs like double vision, loss of consciousness, or altered mental status, and any headache that represents a significant change from your usual pattern in frequency, severity, or character. A headache that worsens with coughing, straining, or changes in position also warrants investigation.