Why Do I Wake Up With a Headache?

A headache that is already there when you open your eyes usually has something to do with the night just gone: how you breathed, how you lay, what you drank the evening before, or how long it has been since your last cup of coffee. Most morning headaches are occasional and fade once the day gets moving. When they turn up on most mornings, they deserve a closer look, and sometimes a conversation with a GP.

What a morning headache can feel like

People describe them in quite different ways. For some it is a dull band across the forehead, for others a heavy pressure behind the eyes, an ache at the base of the skull that creeps upwards, or a throb on one side. Some lift within an hour of getting up; others linger until lunchtime. Noting where yours sits, what it feels like and how long it lasts is worthwhile, because the pattern often hints at the cause.

Common reasons the night leaves you with a sore head

Breathing that is disturbed while you sleep

Loud snoring, especially with pauses, gasps or snorts, can mean breathing is being interrupted during the night. A headache on waking is one of the features that can go with this, often alongside feeling unrefreshed and sleepy during the day. Only a health professional can tell whether it is happening, so if a partner has noticed it, mention it to your GP rather than guessing.

Clenching or grinding your teeth

Plenty of people clench their jaw or grind their teeth at night without realising. The muscles around the jaw and temples work for hours, and the morning brings an ache at the sides of the head, a tired jaw or teeth that feel tender. A dentist can look for signs of wear and talk through the options.

Too little sleep, or sleep at odd times

Short nights, broken nights and lie-ins that shift the body clock can all set off a headache in some people, and a long weekend lie-in can do it as well. A steady wake time often helps more than squeezing in extra hours. Our answer on finding the right sleep duration explains how to work out what suits you.

Alcohol and a dry night

Evening drinks can leave you short of fluid and tend to make the second half of the night lighter and more broken. Both can show up as a sore head in the morning, even after what felt like a modest amount. Going to bed thirsty in a warm, dry bedroom adds to the effect.

The gap since your last coffee

If tea, coffee or cola keep you going through the day, the overnight break is the longest stretch your body spends without caffeine. For some regular drinkers that gap is enough to bring on a withdrawal-type headache that lifts soon after the first cup. Cutting down gradually tends to be kinder than stopping all at once, and our answer on why caffeine can make you tired looks at the other side of that habit.

Your pillow and sleeping position

A pillow that is too high, too flat or too squashy can hold the neck at an awkward angle for hours. Tight neck and shoulder muscles can then feed an ache that climbs up the back of the head. If your neck is stiff too, see our answer on neck pain from sleeping wrong.

Painkillers taken very often

Taking headache tablets on many days each month can, for some people, keep the headaches coming back. If you reach for them most mornings, a pharmacist or GP can help you review this safely rather than stopping on your own.

Clues from your own pattern

What you notice	Possible link	A sensible first step
Ache in the temples and a sore jaw	Clenching or grinding	Ask a dentist to check for wear
Partner mentions loud snoring or pauses	Breathing disturbed at night	Raise it with a GP
Worse after evenings with a drink	Alcohol and too little fluid	Try alcohol-free evenings and water earlier on
Goes quickly after the first coffee	The overnight caffeine gap	Reduce caffeine slowly over a couple of weeks
Stiff neck, ache at the back of the head	Pillow height or position	Test a different pillow or position for a week
Weekends worse than weekdays	Shifted sleep timing	Keep the wake time within the same window every day

A fortnight of small experiments

1. Keep a short diary: bedtime, wake time, drinks, caffeine, any tablets taken, and a score out of ten for the headache each morning.
2. Get up at roughly the same time seven days a week.
3. Have a glass of water in the early evening and keep the bedroom cool and aired.
4. Move the last caffeinated drink to the morning or early afternoon.
5. Check that your pillow keeps your head roughly in line with your spine.

The diary also gives a GP or dentist something concrete to work with. If you wake tired as well as sore despite plenty of hours in bed, the two may share a cause, and our answer on feeling tired after eight hours of sleep covers that side.

When to get help

Book a routine GP appointment if morning headaches happen on most days, are slowly getting worse, or come with daytime sleepiness, snoring that others have noticed, or a need for painkillers most days. Get urgent medical help if a headache:

• comes on suddenly and severely, unlike anything you have had before;
• arrives with a fever, a stiff neck, a rash, confusion or a drowsiness you cannot shake off;
• comes with weakness, numbness, slurred speech or changes in your vision;
• follows a knock to the head.

Quick questions

Is it normal to wake up with a headache now and then?

An occasional sore head after a late night, a few drinks or a restless sleep is common. It is a repeating pattern, rather than the odd morning, that deserves attention.

Can a pillow really cause a headache?

It can play a part. Neck muscles held in a strained position for hours can leave tension that is felt in the head, which is why changing pillow height is such a simple experiment to try.

Should I take something as soon as I wake?

For an occasional headache, follow the packet instructions and ask a pharmacist if you are unsure what suits you. If you find you need something most mornings, talk to a professional about what is behind it instead of treating it day by day.