The simplest way to tell a migraine from a regular headache is by looking beyond the pain itself. A tension headache causes steady, dull pressure on both sides of your head. A migraine brings throbbing pain, usually on one side, along with a constellation of other symptoms like nausea, light sensitivity, and sometimes visual disturbances that a standard headache simply doesn’t produce. But the differences go much deeper than that, starting well before the pain begins and lasting after it ends.
What a Tension Headache Feels Like
Tension headaches are the most common type. They produce a steady, squeezing pressure that wraps around your head like a tight band. The pain is mild to moderate, affects both sides, and doesn’t throb or pulse. You won’t feel nauseous, and bright lights or loud sounds won’t bother you more than usual.
The typical cause is muscle tension in the shoulders, neck, and scalp, often from stress, poor posture, or fatigue. These headaches build gradually, last anywhere from 30 minutes to several hours, and respond well to over-the-counter pain relievers. Crucially, a tension headache doesn’t stop you from going about your day. It’s uncomfortable, but you can still function normally.
What Makes a Migraine Different
A migraine is a neurological event, not just head pain. The pain is moderate to severe, typically throbs or pulses, and often concentrates on one side of the head. But what really sets it apart is everything that comes with it: nausea (sometimes with vomiting), extreme sensitivity to light and sound, and often sensitivity to touch on the skin. In a study of 321 migraine patients through the American Registry for Migraine Research, 69% met the threshold for photosensitivity even between attacks.
During a migraine, most people need to lie down in a dark, quiet room. Physical activity makes the pain worse. A tension headache never drives you to bed the way a migraine does. This preference for rest and stillness is one of the most reliable ways to tell the two apart.
Migraines also last much longer. While a tension headache clears in hours, a migraine can persist for 4 to 72 hours if untreated.
The Phases Only Migraines Have
One of the clearest differences is that migraines unfold in distinct phases. A tension headache starts and stops. A migraine has a timeline that can stretch over days.
The first phase, called the prodrome, can begin hours or even days before the headache arrives. Symptoms include mood changes (irritability or depression), difficulty concentrating, fatigue, neck stiffness, food cravings, frequent urination, and excessive yawning. These warning signs are unique to migraine. If you notice a pattern of unusual yawning or neck stiffness before your headaches, that’s a strong signal you’re dealing with migraines rather than tension headaches.
After the pain resolves, migraines have a postdrome phase sometimes called a “migraine hangover.” You may feel fatigued, achy, dizzy, and have trouble concentrating for hours afterward. Tension headaches don’t leave this kind of residue.
Aura: The Symptom That Removes All Doubt
About 25 to 30% of people with migraines experience aura, a set of sensory disturbances that typically begin 5 to 60 minutes before the headache pain starts. Visual aura is the most common type: you might see flashing lights, zigzag lines, sparkling dots, or blind spots that slowly expand across your field of vision.
Some people experience sensory aura instead, feeling tingling or numbness that starts in one hand and creeps up the arm, sometimes reaching the face. Less commonly, aura affects speech, causing slurred words or difficulty finding the right word. If you experience any of these, you’re having a migraine. No other common headache type produces aura.
Different Triggers, Different Biology
Tension headaches and migraines can share a few triggers, particularly stress and poor sleep. But migraines respond to a much wider and more specific set of triggers that reflect their neurological nature.
Migraine triggers include specific foods (aged cheese, chocolate, processed meats with nitrites, citrus, nuts, and foods with MSG), alcohol (especially red wine), hormonal fluctuations tied to menstrual cycles or perimenopause, caffeine withdrawal, environmental factors like bright or flickering lights, strong scents, humidity, and weather changes. Tension headaches are primarily triggered by muscle tension from stress, poor posture, eye strain, or skipping meals.
The hormonal connection is particularly telling. If your headaches reliably arrive around your period or worsened during perimenopause, they are very likely migraines. Changes in estrogen levels are closely tied to migraine but not to tension headaches.
How Migraines Differ From Cluster Headaches
Some people confuse migraines with cluster headaches, which are a third and rarer type. Cluster headaches produce severe, stabbing pain around or behind one eye and come in bouts (or “clusters”) lasting weeks or months, often at the same time each day. Two features reliably separate them from migraines.
First, duration: a cluster headache lasts 15 minutes to 3 hours, while a migraine lasts 4 to 72 hours. Second, behavior during an attack is strikingly different. People with migraines want to lie still in the dark. People with cluster headaches become restless and agitated, pacing or rocking because they can’t find a comfortable position.
Cluster headaches also cause distinctive one-sided symptoms: a red, watery eye, a drooping eyelid, or a stuffy or runny nostril, all on the same side as the pain. Migraines can occasionally cause tearing or congestion too, but those symptoms affect both sides rather than just one.
A Quick Comparison
- Pain quality: Tension headaches feel like pressure or tightening. Migraines throb or pulse.
- Location: Tension headaches wrap around both sides. Migraines typically affect one side.
- Severity: Tension headaches are mild to moderate. Migraines are moderate to severe and can be debilitating.
- Light and sound sensitivity: Absent in tension headaches. A hallmark of migraine.
- Nausea: Rare with tension headaches. Common with migraines.
- Physical activity: Doesn’t worsen tension headaches. Makes migraines significantly worse.
- Duration: Tension headaches last 30 minutes to several hours. Migraines last 4 to 72 hours.
- Warning signs: Tension headaches have none. Migraines often have prodrome symptoms and sometimes aura.
Red Flags That Signal Something More Serious
Most headaches are either tension type or migraine, and while migraines are miserable, they aren’t dangerous. However, some headache patterns point to something that needs urgent evaluation. Headache specialists use a set of warning signs worth knowing.
A sudden, explosive headache that reaches maximum intensity within seconds (sometimes called a thunderclap headache) is one of the most concerning. This can signal a vascular emergency like a ruptured aneurysm and needs immediate evaluation. A headache accompanied by new neurological symptoms, such as weakness on one side of the body, new numbness, or vision changes that don’t fit your usual pattern, also warrants urgent attention.
Other red flags include headaches accompanied by fever, night sweats, or unexplained weight loss; a new type of headache starting after age 50; headaches that are clearly getting worse over weeks or months; and headaches that change dramatically with body position or with coughing and straining. Any of these patterns suggest the headache may be caused by an underlying condition rather than being a primary headache disorder.