Waking at 3am is common and often harmless. Sleep gets lighter in the second half of the night, so brief waking is more likely then. It becomes a problem when you cannot get back to sleep, it happens most nights, or you feel worn out in the day. Alcohol, stress, sleep apnoea and low mood can all play a part.
Why do so many people wake in the early hours?
Deep sleep comes mostly in the first half of the night, and dreaming sleep gets longer towards morning (NINDS). By the early hours most of the night's deep sleep is behind you, so a noise, a full bladder or a passing thought is more likely to wake you.
Waking also becomes more common with age. A review of 169 sleep studies found that time awake after first falling asleep rises by about 10 minutes with each decade of adult life (Boulos, 2019). Waking briefly and drifting off again is part of normal sleep.
What can cause it?
Alcohol is one. It shortens the time to fall asleep and consolidates the first half of the night, then disrupts sleep in the second half (Ebrahim, 2013).
Stress keeps the body on alert. People with insomnia show raised levels of arousal across the nervous and hormonal systems, by night and by day, and worry, rumination and habits formed around poor sleep help keep it going (Riemann, 2010).
Sleep apnoea breaks up sleep. NICE lists broken sleep, insomnia and waking to pass urine among the features that should prompt an assessment for it (NICE NG202). If you also snore or feel sleepy in the day, read signs of sleep apnoea in adults.
Low mood and insomnia are closely linked. Insomnia is consistently associated with depression (Ohayon, 2002), and people without depression who have insomnia have about twice the risk of developing it (Baglioni, 2011).
When is it insomnia?
Chronic insomnia means difficulty falling asleep, staying asleep or getting refreshing sleep at least three times a week for at least three months, with an effect on your day. About 8% of adults in high-income countries have it (RAND Europe, 2023). Around a third of people have at least one insomnia symptom, and about 6% meet the full diagnosis (Ohayon, 2002).
What should I do when I wake?
Sleep specialists use a set of instructions called stimulus control, which aim to rebuild the link between bed and sleep (AASM, 2021).
- Go to bed only when sleepy.
- Get out of bed when you cannot sleep, and go back when you feel sleepy.
- Use the bed for sleep and sex only, not for reading or screens.
- Get up at the same time every morning.
- Avoid napping in the day.
The same guidance advises against relying on sleep hygiene tips alone for chronic insomnia (AASM, 2021). Tips can help, but long-running insomnia usually needs a structured treatment.
When should I see a doctor?
See a doctor if early waking happens most nights, has gone on for more than a few weeks, or leaves you tired, low or struggling to concentrate. Also see one if you snore, have been seen to stop breathing, or wake gasping. If low mood comes with thoughts of harming yourself, call 999 or Samaritans on 116 123.
The first-line treatment for chronic insomnia is CBT for insomnia, which we compare with sleeping tablets in CBT for insomnia or sleeping tablets.
Help at The Wellness
A Sleep Consultation at our Sleep Clinic costs £450. The doctor looks for the cause, including sleep apnoea, low mood and the effect of any medicines, and tells you whether a study is needed. If it is insomnia, CBT for Insomnia is £1,495, an eight-week programme of six to eight sessions with a specialist, using sleep restriction, stimulus control and a sleep diary. If breathing is the issue, the Home Sleep Study is £1,395, and The Sleep Clinic programme, the most chosen option, is £2,995.
Chronic insomnia also has a cost at work. RAND Europe linked it to an average of 45 to 54 lost working days a year in a study funded by a drug company (RAND Europe, 2023). Book a sleep consultation if 3am has become a habit.
This article is general information and does not replace a consultation. If you are falling asleep at the wheel, stop driving until you have been assessed. If you have chest pain, severe breathlessness or signs of a stroke, call 999.
Frequently asked questions
Why do I wake at 3am and can’t get back to sleep?
Sleep is lighter in the second half of the night, so small disturbances wake you more easily. Lying awake can then become a habit, especially at times of stress. If it happens most nights for three months and affects your day, it may be insomnia, which CBT for insomnia is designed to treat.
Is waking at 3am a sign of anxiety?
It can be. People with insomnia show raised arousal in the body and brain by day and night, and worry and rumination help keep it going. Long-running insomnia is also linked with a higher risk of depression, so it is worth raising with a doctor.
Why do I wake up at 3am after drinking?
Alcohol helps you fall asleep and deepens the first half of the night, but it disturbs sleep in the second half. Early waking after an evening of drinking can be the result.
Why do I wake up at night to pass urine?
There are several causes, and a doctor should check them. Waking to pass urine is one of the features NICE lists as a reason to consider sleep apnoea, particularly alongside snoring or daytime sleepiness.
Should I get out of bed if I can’t sleep?
Yes. Sleep specialists advise getting out of bed when you cannot sleep and going back only when sleepy, keeping the bed for sleep, waking at the same time every morning and avoiding naps.
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