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Why do I keep waking up at 3am? Common causes and what to do

Reviewed by Dr Aaiman Liaqat✓, BDS

By 3 min readPublisher: Saadat Rafiq

Last updated: 1 November 2026References

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Illustration of a woman lying awake in bed in a dim bedroom, looking at the ceiling, a plain bedside clock with no numbers on the nightstandIllustration
On this page 7 sections

In short

Waking in the night and not getting back to sleep is a common sign of insomnia. Stress, alcohol, caffeine and a hot or noisy room are frequent causes. Keep the same wake-up time, cut caffeine and alcohol 6 hours before bed, and see a GP if it lasts months.

Jump to the steps

At a glance

What it is
Waking in the night or too early is a symptom of insomnia (NHS)
Common causes
Stress, anxiety, alcohol, caffeine, noise, heat, shift work
Adults need
7 to 9 hours of sleep on average
See a GP if
It lasts months, habits have not helped, or you cannot cope
Advice from
NHS Insomnia page, reviewed 19 March 2024
Checked
November 2026

Is it insomnia?

The NHS says you have insomnia if you regularly wake up several times during the night, or wake up early and can't get back to sleep, and still feel tired the next day. If it's been going on for less than 3 months, it's called short-term insomnia. Three months or more is long-term insomnia.

Common causes

The NHS lists these as the most common causes:

  • stress, anxiety or depression
  • noise, or a room that's too hot or cold
  • an uncomfortable bed
  • alcohol, caffeine or nicotine
  • jet lag or shift work

Some conditions can also cause it, including restless legs syndrome, an overactive thyroid and the menopause, as can long-term pain, snoring or interrupted breathing (sleep apnoea), and many medicines.

Step by step

  1. Get up at the same time every day

    Illustration of a woman in pyjamas opening the bedroom curtains to the morning sun with her eyes closed, the bed behind her
    Illustration

    Wake up and get out of bed at the same time every day, even after a bad night (NHS). Don't sleep in or nap during the day to catch up. Only go to bed when you feel sleepy.

  2. Cut caffeine and alcohol earlier

    Illustration of a mug of tea and a glass of water on a kitchen table in the evening, a lidded storage jar behind them and a lamp lit in the window
    Illustration

    Don't drink alcohol, tea or coffee, or smoke, for at least 6 hours before bed, and avoid a big meal late at night (NHS).

  3. Make the bedroom dark, quiet and comfortable

    Illustration of a calm dark bedroom with blackout curtains drawn, an eye mask and a pair of ear plugs on the bedside table
    Illustration

    Use curtains, blinds, an eye mask or ear plugs if needed, and make sure your mattress, pillows and covers are comfortable (NHS). A room that's too hot or cold is one of the common causes of waking.

  4. Wind down for an hour before bed

    Illustration of a woman reading a paperback in an armchair under a warm lamp, her phone face down on a side table
    Illustration

    Relax for at least an hour before bed, for example with a bath or a book. Don't watch TV or use your phone right before bed. Exercise regularly during the day, but not in the 4 hours before bed (NHS).

The NHS sleep habits at a glance

WhenDoDon't
MorningWake up and get out of bed at the same time every daySleep in after a bad night
DaytimeExercise regularlyNap during the day, or drive when you feel sleepy
6 hours before bed–Smoke, or drink alcohol, tea or coffee
4 hours before bed–Exercise
Late evening–Eat a big meal late at night
Last hourRelax, for example with a bath or a bookWatch TV or use your phone right before bed
BedtimeOnly go to bed when you're sleepy; keep the room dark and quiet (curtains, blinds, an eye mask or ear plugs) and the mattress, pillows and covers comfortable–

Source for every row: NHS Insomnia page, last reviewed 19 March 2024, read again on 2 November 2026.

If this doesn't work

  • Changing your habits hasn't helped, it's gone on for months, or you can't cope: see a GP. They'll look for the cause and may offer cognitive behavioural therapy (CBT), face to face or as an online programme (NHS).
  • Someone notices your breathing stops and starts in your sleep, or you make gasping, snorting or choking noises, or you always feel very tired in the day: see a GP. These are signs of sleep apnoea, and they may refer you to a sleep clinic for tests. If someone has seen it happen, it helps to bring them with you (NHS).
  • You're thinking of sleeping aids: pharmacy products may help for 1 to 2 weeks but can't cure insomnia and can make you drowsy. Check with your doctor first (NHS).
  • Don't drive when you feel sleepy.

Questions readers ask

Is waking up at 3am a sign of something serious?

Usually it is a sign of insomnia, which the NHS says usually gets better by changing your sleeping habits. Common causes include stress, anxiety, alcohol, caffeine and a room that is too hot or noisy. See a GP if it has gone on for months or you cannot cope.

Should I take a nap if I woke up at 3am?

The NHS advises not napping during the day and not sleeping in after a bad night. Stick to your regular wake-up time instead.

Can menopause make me wake at night?

Yes. The NHS lists menopause among the conditions that can cause insomnia. A GP can help.

Do sleeping aids from the pharmacy work?

The NHS says they cannot cure insomnia but may help for 1 to 2 weeks, and should not be taken for longer. Check with your doctor before taking anything for sleep.

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