What Is a Tension Headache?

Almost everyone gets a headache from time to time, and the great majority of those are tension-type headaches. They are rarely dangerous, but the dull, gripping pressure can ruin an afternoon and make it hard to concentrate. Knowing what a tension headache actually is, what tends to set it off, and when it is worth getting checked takes a lot of the worry out of it. This is general information, not medical advice — for your own symptoms speak to your GP, pharmacist or NHS 111.

What a tension headache is

A tension-type headache is a common, usually mild-to-moderate headache felt as a dull, pressing tightness on both sides of the head. It is the most frequent kind of headache and the one most people simply call "a headache".

Rather than throbbing or pulsing, the pain feels steady, like a tight band squeezing around the forehead, temples and back of the head. It often spreads into the neck and shoulders, and the muscles there can feel tender. Crucially, a tension headache does not usually get worse with everyday movement and only rarely comes with the nausea or strong light-sensitivity that mark out a migraine.

Doctors group tension headaches by how often they happen:

• Infrequent episodic — fewer than one day a month on average.
• Frequent episodic — between 1 and 14 days a month.
• Chronic — 15 or more days a month for at least three months.

Most people only ever experience the occasional episodic kind.

What causes them

The old idea that tension headaches come purely from "muscle tension" is now seen as too simple. The exact mechanism is not fully understood, but it involves a mix of muscle tightness around the head and neck and changes in how the nervous system processes pain. What is clearer is the list of everyday things that tend to bring one on.

Common triggers include:

• Stress and anxiety — by far the most frequently reported trigger. The strain of a busy or worrying period often shows up as a headache. Because the stress hormone cortisol rises during pressured periods, managing stress is central to managing these headaches.
• Poor posture — long hours hunched over a laptop or phone strain the neck and shoulder muscles.
• Tiredness and poor sleep — both too little rest and disrupted sleep can set one off.
• Skipping meals — going too long without eating, and the dip in blood sugar that follows.
• Not drinking enough — even mild dehydration is a well-recognised headache trigger.
• Eye strain, bright light, loud noise and certain smells.
• Caffeine — both too much and, in regular drinkers, sudden withdrawal. Our guide to caffeine and its effects explains why missing your usual coffee can bring on a thumping head.

Most headaches are the result of several of these stacking up on the same day — a stressful deadline, a skipped lunch and not enough water together, rather than any single cause.

Tension headache or migraine?

It helps to tell a tension headache apart from a migraine, because they are managed differently. The distinction is not always clean, but the typical patterns differ.

If your headaches are frequently one-sided, severe, pulsating or come with nausea and a strong dislike of light, they may be migraines and worth discussing with a GP, as different treatments and preventive options apply.

How to ease one

For the occasional tension headache, simple measures are usually enough:

• Rest in a quiet place for a while if you can, and ease tension in the neck and shoulders.
• Drink some water — rehydrating helps if fluids were part of the cause.
• Eat something if you have skipped a meal.
• Take a break from screens and rest your eyes.
• Gentle activity, such as a short walk and some fresh air, helps many people more than lying down.

Over-the-counter painkillers such as paracetamol or ibuprofen can help, taken according to the packet and any pharmacist advice. The important caveat is to use them sparingly. Taking painkillers too often — broadly, on more than around half the days of the month over time — can lead to a medication-overuse (rebound) headache, where the very treatment starts to perpetuate the problem. If you find yourself reaching for painkillers most days, speak to a GP or pharmacist rather than continuing.

How to prevent them

Because tension headaches are so closely tied to everyday habits, prevention is often more effective than treatment. Useful steps include:

• Managing stress. Whatever helps you wind down — exercise, time outdoors, relaxation techniques — tends to reduce headaches too.
• Keeping regular sleep. Consistent, sufficient rest matters; see our guide to how much sleep you need for realistic targets.
• Drinking enough through the day and not skipping meals.
• Sorting out your posture. Set your screen at eye level, take regular breaks from sitting, and avoid craning over a phone for long stretches.
• Watching caffeine. Keep it moderate and consistent rather than swinging between a lot and none.

Keeping a brief headache diary — noting when headaches strike and what came before — can reveal personal patterns and triggers that are otherwise easy to miss.

When to see a GP

Tension headaches are not dangerous, but some headaches need prompt attention. Seek urgent medical help — call 999 or go to A&E — for a headache that comes on suddenly and is extremely severe, or one accompanied by a stiff neck, fever, rash, confusion, seizures, weakness, slurred speech, or problems with vision or balance.

Make a routine GP appointment if your headaches are becoming more frequent or more severe, are not relieved by usual painkillers, regularly wake you from sleep, or are interfering with daily life. Frequent headaches are worth investigating, not just enduring, and effective help is available.

The bottom line

A tension-type headache is the everyday headache most of us recognise: a dull, tight band of pressure across both sides of the head, usually mild, and rarely a sign of anything serious. Stress, tiredness, poor posture, skipped meals and not drinking enough are the usual culprits, often combining on the same day. Most cases settle with rest, fluids, food and the occasional painkiller used carefully. If headaches become frequent or severe, or a sudden very severe one appears, get it checked rather than simply pushing through.