A migraine is not simply a severe headache. It is a distinct neurological condition with its own biology, its own progression through multiple phases, and its own treatment pathway. A tension-type headache, the kind most people mean when they say “headache,” involves a dull, pressing pain on both sides of the head that can last anywhere from thirty minutes to several days. A migraine typically produces intense, throbbing pain on one side, often accompanied by nausea, sensitivity to light and sound, and sometimes visual disturbances. But the differences go deeper than how the pain feels, and understanding them matters for getting the right diagnosis and the right relief.
How a Migraine Feels Different From a Tension Headache
The simplest way to tell a migraine apart from a tension-type headache is to pay attention to more than just pain intensity. A tension headache tends to feel like a tight band squeezing around your head. The pain is steady and bilateral, meaning it affects both sides roughly equally. You can usually keep going about your day, even if it’s unpleasant. Tension headaches rarely come with nausea, and while noise or light might be mildly annoying, they don’t typically send you running to a dark room.
Migraine pain, by contrast, is usually pulsating and concentrated on one side of the head, though it can shift sides between attacks or even during one. What really sets a migraine apart is everything else that comes with it: nausea or vomiting, a strong need to avoid light and sound, and sometimes sensitivity to certain smells. Physical activity tends to make a migraine worse, so people often feel the need to lie down and be still. Many people also experience changes in vision, tingling in the face or hands, or difficulty finding words. These additional features are not just add-ons; they’re part of the condition itself, reflecting changes happening across multiple brain systems.
The Four Phases of a Migraine Attack
One of the clearest signs that migraine is more than a headache is that it unfolds in phases, sometimes starting a full day or two before the pain arrives. Not every person experiences all four phases with every attack, but recognizing them can help you anticipate what’s coming.
The first phase is the prodrome, sometimes called the premonitory phase. Hours or even a day before the headache starts, you might notice unusual fatigue, mood changes, excessive yawning, food cravings, or difficulty concentrating. These symptoms are linked to shifts in brain chemistry, particularly in the hypothalamus, where neurotransmitters involved in appetite, sleep, and mood regulation become unusually active.1PubMed Central. The premonitory phase of migraine is due to hypothalamic dysfunction: revisiting the evidence If you’ve ever craved chocolate the evening before a migraine, that craving was likely a prodrome symptom rather than a trigger.
The second phase is the aura, which affects roughly a quarter to a third of people with migraine. An aura consists of temporary neurological disturbances that usually last between five and sixty minutes. The most common form is visual: shimmering zigzag lines, blind spots, or flashing lights. Some people experience tingling that creeps along one arm or side of the face, or temporary difficulty speaking. The underlying cause is a wave of electrical activity that moves slowly across the surface of the brain, temporarily disrupting normal nerve function before the area recovers.2PubMed. Pathophysiology of the migraine aura. The spreading depression theory Aura can be alarming, especially the first time it happens, and it’s sometimes mistaken for a stroke. The key difference is that aura symptoms build gradually over minutes and then resolve, while stroke symptoms appear suddenly.
The third phase is the headache itself, which can last anywhere from four hours to three days. This is the most recognized part of a migraine, but as the other phases show, the headache is really just one segment of a longer event.
The fourth phase is the postdrome, sometimes called a “migraine hangover.” After the pain subsides, many people feel drained, foggy, or emotionally flat. One study found that the most common postdrome symptoms were fatigue, difficulty concentrating, and lingering head discomfort, with the average person reporting around eight distinct symptoms during this phase.3PubMed. The migraine postdrome: Clinical characterization, influence of abortive treatment and impact in the quality of life Another study reported that over 90% of migraine patients experienced postdrome symptoms, with low mood and concentration difficulties affecting the majority.4Insights – Journal of Health and Rehabilitation. CLINICAL PROFILE OF THE POSTDROME PHASE OF MIGRAINE AMONG THE PATIENTS AT NEUROLOGY DEPARTMENT OF A TERTIARY CARE HOSPITAL The postdrome is a real, measurable phase that can last a day or more, and it helps explain why people often feel “off” even after the pain is gone.
What Is Actually Happening in the Brain
Tension-type headaches and migraines arise from fundamentally different processes. In a tension-type headache, the leading explanation involves sensitivity in the muscles and soft tissues around the head and neck. Prolonged tightness or trigger points in the muscles of the scalp, jaw, and upper shoulders send pain signals into the central nervous system.5PubMed. Myofascial trigger points and sensitization: an updated pain model for tension-type headache When the headaches become chronic, those repeated signals can change how the brain processes pain, making the system more sensitive over time.6PubMed. Central sensitization in tension-type headache–possible pathophysiological mechanisms But the brain itself is not the origin of the problem in the same way it is in migraine.
Migraine, by contrast, is driven by the trigeminovascular system, a network connecting the trigeminal nerve (the main sensory nerve of the face and head) with blood vessels in the membranes surrounding the brain. During a migraine, nerve endings in these membranes release a signaling molecule called CGRP. This release sets off a cascade: inflammation around the blood vessels, sensitization of the nerves that detect pain, and eventually amplified pain signals pouring into the brainstem.7PubMed Central. CGRP and the Trigeminal System in Migraine The process doesn’t stop at the periphery. CGRP also acts within the nerve cluster itself, affecting neighboring neurons and support cells, which helps explain why migraine pain can intensify and spread over hours.8PubMed Central. Migraine and the trigeminovascular system-40 years and counting
For decades, the dominant explanation for migraine was that blood vessels in the brain dilated excessively, and that dilation itself was the source of the pain. That theory has largely been overturned. While blood vessel changes do occur during a migraine, they don’t appear to be the cause of the pain. Evidence now points firmly to the brain itself as the driver, with changes in the brainstem and deeper brain structures accounting for the full range of migraine symptoms.9Brain. The vascular theory of migraine—a great story wrecked by the facts This shift in understanding has practical importance: it freed drug developers to pursue treatments that target nerve signaling rather than blood vessel constriction, which matters a great deal for patients who have heart disease or high blood pressure and couldn’t safely use older migraine drugs.10PubMed Central. Neurovascular contributions to migraine: Moving beyond vasodilation
Why So Many Migraines Get Misdiagnosed
One of the most persistent problems in headache medicine is that migraines are frequently mistaken for sinus headaches. The reason is surprisingly simple: migraine can produce sinus-like symptoms. Nasal congestion, watery eyes, facial pressure, and even a runny nose occur in a large proportion of migraine attacks because the trigeminal nerve, which drives migraine pain, also controls blood flow and secretion in the nasal passages. One study found that about three-quarters of patients ultimately diagnosed with migraine had experienced cranial autonomic symptoms during their headaches, including nasal congestion in over half of them.11Mayo Clinic Proceedings. Diagnosis and Management of Headaches Associated With Nasal and Sinus Complaints
The overlap between migraine symptoms and sinus symptoms can cause years of diagnostic delay. Patients often see ear, nose, and throat specialists and receive treatment for sinusitis before anyone considers migraine. One analysis described this pattern as “guilt by provocation, location, and association”: because the pain sits over the sinuses and gets worse with weather changes, both patients and doctors jump to the sinus diagnosis. The formal diagnostic criteria for migraine don’t emphasize these autonomic symptoms, which contributes to the confusion among clinicians who aren’t headache specialists.12PubMed Central. Migraine misdiagnosis as a sinusitis, a delay that can last for many years
Sex also plays a role in who gets diagnosed. Among people who do see a doctor about their headaches, women are substantially more likely to receive a migraine diagnosis than men, even when headache features are similar.13PubMed. Barriers to the diagnosis and treatment of migraine: effects of sex, income, and headache features Whether this reflects a bias in who gets taken seriously or a difference in how men and women describe their symptoms is unclear, but the result is that many men with migraine go undiagnosed. Income also predicts treatment quality: among people with a migraine diagnosis, higher household income was the strongest predictor of receiving guideline-appropriate treatment.13PubMed. Barriers to the diagnosis and treatment of migraine: effects of sex, income, and headache features
Cluster Headache as a Third Category
The headache-versus-migraine framing misses a third major type that is rarer but often more severe: cluster headache. Cluster attacks produce excruciating, one-sided pain centered around the eye, lasting between 15 minutes and three hours, and they can strike up to eight times a day during active periods.14PubMed Central. Cluster Headache: Epidemiology, Pathophysiology, Clinical Features, and Diagnosis Unlike migraine, which makes people want to lie still, cluster headache causes restlessness and agitation. People having a cluster attack often pace, rock, or bang their head against the wall.
Cluster headache and migraine do share some features, including sensitivity to alcohol as a trigger and responsiveness to certain of the same medications. Both also involve the trigeminal nerve, which has led to ongoing debate about whether they sit on a spectrum rather than being entirely separate conditions.15PubMed Central. Debate: Are cluster headache and migraine distinct headache disorders? For practical purposes, the distinction matters because cluster headache requires different management, and confusing the two can mean years of ineffective treatment.
Genetics and the Migraine Brain
If migraines run in your family, that’s not a coincidence. Migraine has a strong genetic basis, and large-scale genetic studies have identified more than 180 common gene variants that each increase migraine risk by a small amount.16PubMed Central. Genetics of migraine: where are we now? These variants cluster around genes involved in both nerve and blood vessel function, reinforcing the idea that migraine involves the brain and its vascular supply together. Rare, severe forms of migraine that run in families can be traced to single gene mutations affecting how ions move across nerve cell membranes, which changes the brain’s balance between excitation and inhibition and makes it more susceptible to the spreading wave of activity that causes aura.17PubMed. Genetics of migraine: complexity, implications, and potential clinical applications
The practical takeaway is that people with migraine don’t just have a low pain tolerance or a stress problem. They have brains that are wired to be more reactive to certain stimuli. One useful way to think about it is as a sensory threshold condition: the migraine brain oscillates between states of higher and lower vulnerability, and a “trigger” like poor sleep or a skipped meal doesn’t cause the migraine so much as push a brain that was already near its threshold over the edge.18Pain. Migraine understood as a sensory threshold disease This framing explains why the same trigger doesn’t produce a migraine every time, and why people can sometimes “get away with” a known trigger when they’re otherwise well-rested and low-stress.
How Treatment Differs
A tension headache usually responds well to standard over-the-counter painkillers. Migraine can too, especially if you catch the attack early. Anti-inflammatory drugs remain the most commonly used acute treatment for migraine worldwide.19PubMed Central. NSAIDs in the Acute Treatment of Migraine: A Review of Clinical and Experimental Data But when over-the-counter options aren’t enough, migraine has a class of drugs that tension headaches don’t: triptans. These drugs work by narrowing blood vessels and blocking pain pathways in the trigeminal system. They’ve been the gold standard for acute migraine treatment for years, though their blood vessel effects mean they’re not safe for everyone, particularly people with cardiovascular disease.20Journal of Education, Health and Sport. Pharmacological Management of Acute Migraine: A Systematic Review Comparing NSAIDs, Triptans, Gepants, and Opioids
Newer drug classes are changing the landscape. Gepants are small molecules that block the CGRP receptor, targeting the same signaling pathway described earlier without narrowing blood vessels. They’re effective for acute attacks and tend to have fewer side effects than triptans, making them a good option for people who can’t take triptans or haven’t responded to them. Ditans, such as lasmiditan, target serotonin receptors in the brain without vascular effects, though they can cause dizziness.20Journal of Education, Health and Sport. Pharmacological Management of Acute Migraine: A Systematic Review Comparing NSAIDs, Triptans, Gepants, and Opioids
For people with frequent migraines, preventive treatment becomes more important than acute treatment. The most significant recent advance is monoclonal antibodies that target CGRP or its receptor. Four of these are now available, and they work by neutralizing CGRP before it can initiate the inflammatory cascade. They’re given as monthly or quarterly injections and have been shown to reduce the number of headache days while being well tolerated.21PubMed Central. Advances in CGRP Monoclonal Antibodies as Migraine Therapy: A Narrative Review These therapies are increasingly used as first-line prevention in selected patients, a shift from the older approach of repurposing blood pressure medications or antidepressants that happened to reduce migraine frequency.22PubMed Central. CGRP-Targeted Migraine Therapies in Patients With Vascular Risk Factors or Stroke: A Review
Non-drug options also exist. Neuromodulation devices, which deliver mild electrical or magnetic stimulation to the scalp or neck, have shown some effectiveness for acute migraine and may be particularly useful for people who can’t take medications due to other health conditions or pregnancy.23PubMed. Non-invasive neuromodulation in the acute treatment of migraine: a systematic review and meta-analysis of randomized controlled trials
The Medication Overuse Trap
Here’s a cruel irony that applies to both tension headaches and migraines: the very medications used to treat them can make them worse if taken too often. Medication overuse headache occurs when acute pain relievers are used on ten or more days per month (for some drug types, fifteen or more) over a period longer than three months.24PubMed Central. Medication overuse headache: a review of current evidence and management strategies The headaches become more frequent, the medications become less effective, and the person gets stuck in a cycle of escalating use and worsening pain. People with migraine are especially vulnerable because they tend to reach for painkillers more often, but anyone taking headache medication regularly should be aware of the threshold. If you find yourself using painkillers for headaches more than two to three days a week, that pattern itself deserves medical attention.
When Migraine Shows Up Without a Headache
In children, migraine sometimes doesn’t involve head pain at all. Abdominal migraine is a recognized condition in which children experience recurring bouts of moderate to severe belly pain, often with pallor, nausea, and loss of appetite, but without a headache or with only a mild one.25PubMed Central. Review of Abdominal Migraine in Children These episodes can last hours, and between them the child feels fine. Abdominal migraine is considered a precursor to typical migraine later in life. Other childhood conditions thought to be on the migraine spectrum include cyclic vomiting syndrome and even infantile colic.26PubMed Central. Brain to Belly: Abdominal Variants of Migraine and Functional Abdominal Pain Disorders Associated With Migraine
Adults can experience migraine without headache too, sometimes called “silent migraine” or “acephalgic migraine.” The aura phase occurs with all its visual or sensory disturbances, but the headache phase never materializes. This is more common in older adults who had classic migraines with aura earlier in life. It can cause real alarm because the visual symptoms mimic more serious neurological events, and these episodes often lead to emergency room visits and extensive testing before someone realizes what’s happening.
Health Disparities in Migraine Care
Migraine doesn’t affect everyone equally in terms of access to care. Significant disparities in diagnosis, treatment quality, and disability burden persist among underserved populations, including racial minorities, people with lower income, and those without adequate insurance.27PubMed. A Critical Exploration of Migraine as a Health Disparity: the Imperative of an Equity-Oriented, Intersectional Approach The newer CGRP-targeting therapies, while effective, are expensive, and whether they’ll reach the patients who need them most remains an open question. Meanwhile, the diagnosis of migraine itself still relies entirely on clinical history and symptom description. There are no blood tests, no imaging findings, and no biomarkers that definitively confirm or rule out migraine in routine practice.28PubMed Central. Headache-related circuits and high frequencies evaluated by EEG, MRI, PET as potential biomarkers to differentiate chronic and episodic migraine: Evidence from a systematic review That means the quality of your diagnosis depends heavily on the knowledge and attentiveness of whoever you happen to see, and not everyone has equal access to a clinician who knows the difference between a sinus headache and a migraine.