A tension headache feels like a steady, pressing tightness around your head, often described as a band squeezing both sides at once. The pain is dull rather than sharp, mild to moderate in intensity, and doesn’t throb or pulse the way a migraine does. Most episodes last anywhere from 30 minutes to several hours, though they can persist for up to seven days.
The Sensation in Detail
The hallmark feeling is bilateral pressure, meaning both sides of your head hurt at the same time. People commonly point to the forehead, temples, and the back of the head near the base of the skull. The quality is pressing or tightening, like wearing a hat that’s too small or having a rubber band cinched around your skull. It’s never the one-sided, pounding pain typical of a migraine.
Along with the head pressure, you’ll often notice tenderness in the scalp, neck, and shoulder muscles. Pressing on these areas can feel sore or sensitive to touch. Some people feel the tightness radiating down from the back of the head into the upper neck and across the tops of the shoulders, which makes sense given that the muscles in these areas are directly involved in how the pain develops.
The intensity generally stays in the mild-to-moderate range. On a practical level, most people with a tension headache can still get through their day. One useful framework from the American Headache Society describes this as a “green light” headache: you have pain, but you’re still going to work or looking after your kids. A worse episode might push you into “yellow light” territory, where you slow down and take it easy, but tension headaches rarely force you to stop everything and lie in a dark room.
How It Differs From a Migraine
The easiest way to tell a tension headache from a migraine is to check for the symptoms that tension headaches specifically lack. You won’t have nausea or vomiting. You won’t experience strong sensitivity to both light and sound at the same time (mild sensitivity to one or the other is possible, but not both). You won’t see visual disturbances like flashing lights or blind spots. And routine physical activity, like walking upstairs or carrying groceries, won’t make the pain worse. With a migraine, all of those things are common, and moving around typically intensifies the pain.
The strongest predictors that a headache is a migraine rather than a tension headache are nausea, severe or disabling pain, and light sensitivity. If you’re experiencing those three together, you’re likely dealing with a migraine, not tension.
What’s Actually Happening in Your Body
The older explanation was simple: your muscles tense up, and that causes the headache. The reality turns out to be more layered. For occasional tension headaches, the pain likely starts in the muscles and soft tissues around the skull. Pain-sensing nerve endings in the muscles, tendons, and connective tissue of the head and neck become activated. Possible triggers for this activation include localized inflammation, reduced blood flow to the muscles, or sustained muscle contraction.
Researchers have found that people with tension headaches have more “trigger points” in their head and neck muscles than people without headaches. A trigger point is a tight, hypersensitive knot in a muscle that hurts when pressed and can refer pain to other areas. These knots are common in the muscles of the temples, jaw, back of the head, and upper neck.
When tension headaches become frequent or chronic, something else takes over. The constant pain signals flowing in from those muscles and soft tissues can change how your brain processes pain. Essentially, your nervous system becomes more sensitive overall, amplifying pain signals and lowering your pain threshold. At the same time, the brain’s built-in pain-dampening systems may stop working as effectively. This shift from a muscle problem to a nervous system problem helps explain why chronic tension headaches can be harder to treat than occasional ones.
When Tension Headaches Become Chronic
Occasional tension headaches are extremely common and generally not a cause for concern. The line between occasional and chronic is drawn at 15 or more headache days per month, sustained for more than three months (at least 180 days per year). Chronic tension headaches feel the same as the occasional type, but their near-constant presence makes them significantly more disruptive. The pain may wax and wane throughout the day without ever fully disappearing.
If you’ve crossed into that territory, the underlying biology has likely shifted toward central sensitization, where your nervous system itself is part of the problem. This is worth knowing because it changes the treatment approach. Strategies that work well for occasional tension headaches, like a simple pain reliever, become less effective when the headaches are chronic, and overusing pain relievers can actually make them worse.
Common Triggers
Tension headaches are tied to physical and emotional stress more than any other factor. Sustained postures, like hunching over a desk or looking down at a phone for hours, load the neck and shoulder muscles in ways that can set off an episode. Eye strain from prolonged screen use is another frequent contributor. Poor sleep, skipped meals, dehydration, and emotional stress or anxiety round out the most common triggers. Many people notice a pattern: the headache arrives at the end of a long, stressful day, or during a period when sleep has been poor.
Headache Symptoms That Need Urgent Attention
Tension headaches are not dangerous, but some headache patterns signal something more serious. A sudden, explosive headache that reaches maximum intensity within seconds (sometimes called a thunderclap headache) can indicate a vascular emergency like a brain aneurysm and needs immediate evaluation. Other warning signs include headaches accompanied by neurological symptoms like weakness on one side, new numbness, or vision changes. A new type of headache starting after age 50, headaches that are clearly getting worse over weeks or months, or headaches that change dramatically when you shift positions (standing versus lying down) are also worth getting checked.
Fever, night sweats, or unexplained weight loss alongside new headaches can point to a systemic illness causing the pain. And new headache onset during or after pregnancy warrants evaluation for conditions related to blood pressure or blood vessel changes.