Migraine is a specific neurological disorder with a distinct set of symptoms, brain mechanisms, and treatment needs, while “headache” is a broad term covering dozens of conditions, the most common being tension-type headache. The two overlap enough that many people with migraine go years without a correct diagnosis, but they differ in pain quality, accompanying symptoms, underlying biology, and how they respond to medication. Understanding the gap between an ordinary headache and a migraine attack matters because the wrong label often leads to the wrong treatment.
How the Pain Itself Differs
The most common type of everyday headache is tension-type headache, or TTH. It typically feels like a band of steady pressure on both sides of the head, mild to moderate in intensity, and it does not get noticeably worse when you bend over or climb stairs. Migraine pain, by contrast, tends to be moderate to severe, often pulsating or throbbing, and frequently centered on one side of the head. Physical activity like walking up a flight of stairs or bending forward can make migraine pain spike.
That said, the side-of-head distinction is less reliable than most people think. Roughly 40 percent of migraine patients report pain on both sides of the head, and only about a quarter report strictly one-sided pain.1PubMed Central. Debate: differences and similarities between tension-type headache and migraine So if your headache hits both temples, that alone does not rule out migraine. The more distinguishing features are the accompanying symptoms rather than the pain location.
The Symptoms That Set Migraine Apart
What separates migraine most clearly from a run-of-the-mill headache is everything that comes along with the pain. Sensitivity to light (photophobia) affects over 80 percent of migraine patients, and sensitivity to sound (phonophobia) is nearly as common. Nausea and vomiting frequently accompany moderate-to-severe migraine attacks. Tension-type headaches can occasionally involve mild light or sound sensitivity, but nausea and vomiting are rare with TTH.1PubMed Central. Debate: differences and similarities between tension-type headache and migraine
Many people with migraine also experience cranial autonomic symptoms: watery eyes, nasal congestion, facial sweating, or a sensation of ear fullness. Over half of migraine patients report at least one of these symptoms during attacks.2Journal of Neurology, Neurosurgery & Psychiatry. Cranial autonomic symptoms in migraine: characteristics and comparison with cluster headache These symptoms tend to be bilateral and mild to moderate rather than dramatically one-sided, which helps distinguish them from the autonomic features seen in cluster headache. People who experience these autonomic symptoms alongside migraine tend to have more severe, more frequent, and longer-lasting attacks, as well as higher rates of light and sound sensitivity.3PubMed Central. Cranial Autonomic Symptoms and Neck Pain in Differential Diagnosis of Migraine
A migraine attack also has distinct phases. Hours or even a day before the pain starts, many people notice prodromal symptoms: fatigue, mood changes, food cravings, neck stiffness, or difficulty concentrating. About a quarter of migraine sufferers experience aura, which typically involves visual disturbances like shimmering zigzag lines, blind spots, or flashing lights, though it can also affect speech or sensation. After the headache resolves, a postdrome phase can leave people feeling drained or foggy for another day. None of these phases are part of a typical tension-type headache.
Different Biology Under the Surface
Tension-type headache and migraine involve different mechanisms, and this is why they respond to different treatments. The pain of TTH is thought to originate from the muscles and soft tissues around the skull and neck. Tight or irritated muscles in the head and neck region send persistent pain signals that can sensitize the nervous system over time. Trigger points in the muscles of the head and upper neck seem to play an important role, because the referred pain they produce closely matches the pattern that TTH patients describe.4PubMed Central. Does Tension Headache Have a Central or Peripheral Origin? Current State of Affairs In people who get frequent tension-type headaches, that sustained muscle-related input can eventually lead to central sensitization, where the brain’s pain-processing pathways become over-responsive even to mild stimuli.5PubMed. Central sensitization in tension-type headache–possible pathophysiological mechanisms
Migraine, on the other hand, is driven by a system called the trigeminovascular system, a network connecting the trigeminal nerve (the main sensory nerve of the face and head) to the blood vessels lining the brain. During a migraine, trigeminal nerve fibers release a signaling molecule called CGRP (calcitonin gene-related peptide) at their endings around the brain’s blood vessels. That release kicks off a cascade of events including inflammation, blood vessel dilation, and sensitization of the nerve fibers themselves, producing the intense, throbbing pain that defines migraine.6PubMed Central. CGRP and the Trigeminal System in Migraine This understanding of CGRP’s role has been central to migraine neuroscience for decades and is now widely accepted as fundamental to how migraine works.7PubMed Central. Migraine and the trigeminovascular system-40 years and counting
The aura phase, when it occurs, is thought to arise from a wave of electrical and chemical activity called cortical spreading depolarization that moves slowly across the surface of the brain.8PubMed Central. Migraine Visual Aura and Cortical Spreading Depression-Linking Mathematical Models to Empirical Evidence If the wave crosses the visual cortex, you get the classic zigzag hallucinations. If it reaches motor or speech areas, you might get temporary weakness or trouble finding words. Nothing like this happens in ordinary tension-type headache.
Why Migraine Gets Misdiagnosed So Often
One of the most practical reasons to understand the difference is that migraine is frequently mistaken for something else, leading to years of ineffective treatment. In one study, over 80 percent of migraine patients had previously been misdiagnosed with sinus headache. The average time between the first migraine attack and receiving a correct diagnosis was nearly eight years, with some patients waiting decades. About 12 percent of those misdiagnosed patients had even undergone sinus surgery, which predictably did not help.9PubMed Central. Migraine misdiagnosis as a sinusitis, a delay that can last for many years
The sinus confusion is understandable: migraine often produces nasal congestion, facial pressure, and watery eyes through the autonomic symptoms described earlier. If you walk into a doctor’s office describing pressure around your cheeks and forehead with a stuffy nose, “sinus headache” is a tempting label. The clue that it might be migraine instead is the presence of nausea, light sensitivity, or worsening with physical activity. If you have those alongside facial pressure, migraine is far more likely.
Diagnostic delays are not evenly distributed across the population. Migraine remains underdiagnosed and undertreated particularly among communities of color, people with lower incomes, and those with less access to specialist care.10PubMed. A Critical Exploration of Migraine as a Health Disparity: the Imperative of an Equity-Oriented, Intersectional Approach When patients in these groups report symptoms, they are less likely to receive a migraine-specific evaluation and more likely to be treated with generic pain relievers, which can actually make things worse over time.
Hormones and Who Gets What
Before puberty, boys and girls get migraines at roughly equal rates. After puberty, women become about two to three times more likely to experience migraine than men, and this gap persists until menopause, when it narrows again. The culprit appears to be fluctuations in estrogen. A drop in estrogen levels, like the one that occurs just before menstruation, can trigger migraine attacks. Higher and more stable estrogen levels, as during pregnancy, tend to be protective.11Nature Reviews Neurology. Hormonal influences in migraine — interactions of oestrogen, oxytocin and CGRP
Menstrual migraine, which affects roughly 6 percent of reproductive-age women, involves attacks that reliably cluster around the first days of menstruation. The prevailing explanation is that the premenstrual drop in estrogen disrupts the trigeminovascular system’s pain-modulating machinery.12PubMed Central. Menstrual migraine is caused by estrogen withdrawal: revisiting the evidence These attacks tend to be longer, more severe, and harder to treat than migraines at other times of the cycle. The broader pattern is consistent: migraine typically starts after the first menstrual period, often improves during pregnancy, and frequently eases after menopause.13PubMed Central. Migraine in women: the role of hormones and their impact on vascular diseases
Tension-type headache, by contrast, shows a much more modest sex difference and does not have the same clear hormonal pattern. It remains the most common headache type in both men and women across the lifespan.
The Role of Triggers
Both tension-type headache and migraine can be provoked by stress, poor sleep, or dehydration, but migraine has a longer and more idiosyncratic list of triggers. Skipping meals is a well-recognized migraine trigger, and research has identified a plausible brain mechanism: when blood sugar drops, neurons in the hypothalamus that normally dampen pain signaling in the trigeminovascular system become less active, potentially lowering the threshold for a migraine attack. Eating restores that inhibition, and sleep can do something similar through related pathways.14PLoS ONE. Neurochemical Pathways That Converge on Thalamic Trigeminovascular Neurons: Potential Substrate for Modulation of Migraine by Sleep, Food Intake, Stress and Anxiety
Other common migraine triggers include weather changes, alcohol (especially red wine), strong smells, bright or flickering lights, and changes in sleep patterns, whether too much or too little. It is worth noting that triggers are not the same as causes. A person with migraine has an inherently more reactive brain that can be set off by stimuli that most people shrug off. Tension-type headache triggers tend to be more straightforwardly mechanical: prolonged poor posture, jaw clenching, or sustained mental stress that causes the muscles of the head and neck to tighten.
When Treating Headaches Makes Them Worse
One underappreciated risk applies to both headache types but hits migraine patients hardest: medication overuse headache. When you regularly take pain relievers more than two or three days a week, the brain can adapt in ways that actually increase pain sensitivity, creating a cycle of more frequent headaches that demand more medication. Multiple mechanisms have been proposed for this, including central sensitization from repeated pain-pathway activation, direct effects of pain drugs on the brain’s ability to inhibit pain, and changes in serotonin signaling.15PubMed. Medication overuse headache from antimigraine therapy: clinical features, pathogenesis and management
Medication overuse headache is one of the main reasons that people with frequent migraines need preventive treatment rather than just acute pain relief. In the misdiagnosis study mentioned earlier, medication overuse headache appeared only in patients who had been incorrectly labeled as having sinus headaches, presumably because years of ineffective treatment drove them to take painkillers more and more often.9PubMed Central. Migraine misdiagnosis as a sinusitis, a delay that can last for many years Getting the diagnosis right the first time could prevent this entirely.
How Treatments Differ
For an occasional tension-type headache, over-the-counter pain relievers like ibuprofen or acetaminophen work well for most people. Stretching, rest, and managing stress often help too. These drugs also work for mild migraines, but moderate-to-severe migraine attacks often require more targeted treatment.
The discovery that CGRP drives much of migraine pain led directly to new drug classes. Monoclonal antibodies that block CGRP or its receptor are now FDA-approved for migraine prevention, and a newer class of oral drugs called gepants can be used for both acute attacks and prevention. OnabotulinumtoxinA (Botox) injections are another preventive option for chronic migraine. In comparative reviews, Botox tends to show good patient compliance because it is administered by a doctor every three months and generally has fewer side effects, while anti-CGRP antibodies are self-injected monthly.16PubMed Central. Long-Term Management of Migraine With OnabotulinumtoxinA (Botox) vs Calcitonin Gene-Related Peptide Antibodies (Anti-CGRP) None of these migraine-specific preventives are used for tension-type headache, which underscores how different the two conditions really are biologically.
For tension-type headache that becomes chronic, treatment typically focuses on physical therapy, stress management, and sometimes low-dose antidepressants that act on pain pathways. Triptans, the classic acute migraine drugs, do nothing for tension-type headache in people who do not also have migraine, which is one of the clearer clinical confirmations that different mechanisms are at work.
How Migraine Looks Different in Children
Migraine in children does not always look like migraine in adults, which adds another layer of diagnostic confusion. Attacks tend to be shorter, sometimes lasting as little as two hours compared to the four-to-72-hour range in adults. The pain is more often bilateral in children rather than one-sided. And younger children may not be able to articulate light or sound sensitivity, instead simply retreating to a dark, quiet room.
Children can also experience what used to be called “migraine equivalents” — episodic syndromes that may include recurrent abdominal pain, cyclical vomiting, or benign paroxysmal vertigo. These conditions share key features with migraine: they come and go in episodes, neurological exams are normal between attacks, and there is usually a family history of migraine. Many of these children go on to develop typical migraine as they get older.17PubMed. Pediatric migraine variants: a review of epidemiology, diagnosis, treatment, and outcome
Prodromal symptoms, the early warning signs before a migraine attack, also differ by age. In a study of children and adolescents with migraine, about two-thirds reported at least one prodromal symptom, with changes in facial appearance, fatigue, and irritability being most common.18PubMed Central. Pediatric vs. Adult Prodrome and Postdrome: A Window on Migraine Pathophysiology? Adults, by comparison, more often notice food cravings, yawning, or neck stiffness as early signals. Recognizing these warning signs in children can help parents intervene with treatment earlier in the attack.
An Evolutionary Puzzle
A question that researchers have grappled with for years is why migraine persists at all. If it is purely harmful, natural selection should have weeded it out long ago. Several evolutionary hypotheses have been proposed, including the idea that migraine serves as a defense mechanism, a trade-off with some other genetic benefit, or a response to environmental conditions the brain was not designed for.19PubMed. What is the evolutionary advantage of migraine?
One of the more compelling frameworks treats migraine as a kind of forced shutdown. People with migraine appear to have brains that run at a higher metabolic baseline between attacks, making them more vulnerable to energy imbalances when stressed by triggers like missed meals, poor sleep, or sensory overload. The migraine attack itself, with its searing pain, nausea, and withdrawal from activity, may function as an extreme rest signal, forcing the brain to stop working so it can restore its energy balance.20PubMed. The evolutionary meaning of migraine The sickness behavior during a migraine attack, characterized by lethargy, motor stillness, and avoidance of stimulation, closely mirrors a pain-driven rest response seen across mammals, suggesting it is evolutionarily old.21PubMed. The primary headaches as a reflection of genetic darwinian adaptive behavioral responses Whether or not this framework fully explains why the genes behind migraine persist, it does reframe the migraine attack not as a random malfunction but as a purposeful, if profoundly unpleasant, protective response by a brain that is wired to run hot.