You fall asleep fine, then wake up in the dark and your brain immediately starts listing everything that could go wrong. Waking in the middle of the night is common. Here's what may be behind it and what to try.
Written by Vita Globe Editorial Team | Reviewed against the AASM insomnia guideline, CDC guidance and peer-reviewed research
Why do I wake up at 3 a.m. and can't get back to sleep?
Brief awakenings during the night are normal; the problem is when stress keeps you from drifting back off. People who are more 'sleep reactive' are more likely to have their sleep disrupted by stress[1]. Alcohol also tends to disrupt the second half of the night[3]. If you're awake and alert, get up and do something calm until you feel sleepy[5].
Caveat: Regular night waking with loud snoring, gasping or other symptoms needs a medical check. Insomnia that lasts for weeks deserves professional help too, and CBT-I is the recommended first treatment[5].
Sources: Kalmbach et al., 2018 · Ebrahim et al., 2013 · AASM guideline, 2021 · Verified 2026-09-27
IN THIS ARTICLE
Is waking up in the night normal?
Yes. Sleep runs in cycles, and short awakenings between cycles are a normal part of the night. Most people don't remember them. The trouble starts when you become fully alert and your mind kicks in.
Stress is a common trigger. People vary in how much stress disrupts their sleep, a trait researchers call sleep reactivity, and more reactive sleepers are more vulnerable to insomnia[1].
Why does it seem to happen at 3 or 4 a.m.?
There isn't a single "3 a.m. hormone," but a few things line up in the second half of the night:
- Your body is preparing to wake. Cortisol is naturally highest in the morning[2], so the last part of the night is already moving toward wake mode.
- Alcohol wears off. Alcohol can help you fall asleep, but a review of sleep studies found it tends to disrupt sleep in the second half of the night[3]. More in melatonin and alcohol.
- Worry fills the quiet. In the dark with nothing to do, worry and clock-watching can feed each other and keep you awake[4].
What should you do when you wake at 3 a.m.?
- Don't check the time. Clock-watching tends to raise anxiety about sleep[4]. Turn the clock away.
- Keep the lights and phone off. Bright screens make it harder to settle.
- Try slow breathing. Long, slow exhales for a few minutes.
- If you're still wide awake, get up and go somewhere dim and calm. Read something light, then go back to bed when you feel sleepy. This is stimulus control, which the AASM supports for chronic insomnia[5].
- Park the worry. Keep a notepad by the bed and jot down the thought so you don't have to hold onto it.
How can you make 3 a.m. wake-ups less likely?
The CDC's basics help here: consistent sleep and wake times, a cool, quiet bedroom, no caffeine in the afternoon or evening, and avoiding large meals and alcohol before bed[6]. A proper wind-down, like our evening routine for stressful days, helps you go to sleep with less on your mind.
If night waking has been going on for weeks, cognitive behavioral therapy for insomnia (CBT-I) is the treatment the AASM strongly recommends[5].
The honest summary
- Brief night waking is normal; getting stuck awake is the problem.
- Stress, alcohol and worry loops all make it more likely.
- In the moment: no clock, no phone, slow breathing, and get up if you're wide awake.
- Persistent insomnia deserves professional help, and CBT-I works.
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Frequently asked questions
Why do I wake up at the same time every night?
Habits, alcohol wearing off[3], a bedroom that gets warmer or noisier toward morning, and stress can all play a role. If it's persistent, talk to your doctor.
Does stress cause middle-of-the-night waking?
It can. Stress disrupts sleep more in some people than others, and highly reactive sleepers are more vulnerable to insomnia[1].
Should I take melatonin if I wake up at 3 a.m.?
Melatonin is usually taken before bed. Taking it in the middle of the night may leave you groggy in the morning. See how long does melatonin last? and ask your doctor first.
Should I stay in bed or get up?
If you're wide awake and frustrated, get up and do something calm until you're sleepy. This is part of stimulus control, which the AASM supports[5].
Can alcohol make you wake up at night?
Yes. Alcohol tends to disrupt sleep in the second half of the night[3].
Sources
- Kalmbach DA, Anderson JR, Drake CL. The impact of stress on sleep: pathogenic sleep reactivity as a vulnerability to insomnia and circadian disorders. J Sleep Res. 2018;27(6):e12710. doi:10.1111/jsr.12710
- MedlinePlus (National Library of Medicine). Cortisol Test. Updated December 23, 2024. medlineplus.gov
- Ebrahim IO, Shapiro CM, Williams AJ, Fenwick PB. Alcohol and sleep I: effects on normal sleep. Alcohol Clin Exp Res. 2013;37(4):539-549. doi:10.1111/acer.12006
- Harvey AG. A cognitive model of insomnia. Behav Res Ther. 2002;40(8):869-893. doi:10.1016/S0005-7967(01)00061-4
- Edinger JD, Arnedt JT, Bertisch SM, et al. Behavioral and psychological treatments for chronic insomnia disorder in adults: an American Academy of Sleep Medicine clinical practice guideline. J Clin Sleep Med. 2021;17(2):255-262. doi:10.5664/jcsm.8986
- Centers for Disease Control and Prevention. About Sleep. Reviewed November 20, 2023. cdc.gov
About the Vita Globe Editorial Team
The Vita Globe Editorial Team researches and writes our wellness content, working from peer-reviewed research, systematic reviews and guidance from bodies such as the NIH and the FDA. We cite our sources inline and update articles when the evidence changes.
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. This article is for informational purposes only and is not a substitute for medical advice. Talk to your healthcare provider before starting any new supplement, particularly if you are pregnant, nursing, taking medication, or caring for a child.
