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The middle of the night

Trouble falling asleep vs staying asleep: does the difference matter?

Some people lie awake at the start of the night, some wake at 3am, many do both. What each pattern tends to mean, and why CBT-I treats them the same way.

4 min read

Last reviewed October 7, 2026

Two nights of sleep shown as bars, one with a long gap at the start and one with gaps in the middle

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Trouble falling asleep and trouble staying asleep feel different, and people often assume they need different fixes. Mostly, they do not. Both are part of the definition of insomnia, both are driven by the same underlying processes, and CBT-I improves both. The distinction is still worth understanding, because it can point to when something else is going on.

The three patterns

Difficulty falling asleep

Lying awake for a long time at the start of the night. Sometimes called sleep-onset insomnia.

Difficulty staying asleep

Waking during the night and struggling to get back to sleep. Sometimes called sleep-maintenance insomnia.

Waking too early

Waking well before you intended and being unable to return to sleep.

Many people have more than one. All three are covered by the Insomnia Severity Index, the questionnaire used to measure insomnia in research and in clinics. What an ISI score means.

Why they usually share a cause

The processes that keep insomnia going do not care which part of the night they affect:

  • Weak sleep drive. Too much time in bed spreads sleep pressure thinly, so there is not enough to fall asleep quickly or to stay asleep through the night.
  • A conditioned bed. Months of lying awake teach the brain that the bed is for being awake - at 11pm or at 3am.
  • Arousal and worry. Effort to sleep and worry about not sleeping block sleep at the start of the night and after a waking alike.

How CBT-I addresses each of those.

Take the free assessment to see:

  • ✓Your Insomnia Severity Index (ISI) score
  • ✓A personalized 6-week CBT-I plan, built by a sleep physician
  • ✓How your sleep improves, night by night
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What the evidence shows for each

Pooled across randomized trials, CBT-I reduced the time taken to fall asleep by about 19 minutes (95% CI 14.1 to 23.9) and the time spent awake during the night by about 26 minutes (95% CI 15.5 to 36.5). It improved both patterns, with the same treatment.

The waking in the middle of the night

Brief wakings are a normal part of sleep. Everyone surfaces at the end of sleep cycles, and most of the time nobody remembers it. What turns a normal waking into an hour awake is what happens next: noticing, checking the clock, calculating how long is left, and getting frustrated. Why do I wake up at 3am?

When the pattern points elsewhere

The distinction is most useful as a clue that something besides insomnia may be involved:

  • Frequent wakings with snoring, gasping or witnessed pauses in breathing can suggest sleep apnea, which needs ruling out. Do you need a sleep study?
  • Being unable to fall asleep until very late, and unable to wake until late, regardless of effort can suggest a body clock running late rather than insomnia.
  • Waking very early with low mood is worth raising with a clinician. Insomnia and depression.

What to do tonight

Whichever pattern you have, the immediate advice is the same. If you have been awake a while and are getting frustrated, get up and do something quiet elsewhere until you feel sleepy, then go back. Do not check the clock. Get up at your usual time regardless. Can't sleep at 2am?

If it is happening most nights, for months, it is worth treating as a pattern. What CBT-I is, and the rest of this section.

Somnera is a self-guided education program built on CBT-I, founded and written by Dr. Camilo Ruiz, DO, FACOI, FAASM. It is not a diagnosis and does not replace care from your own clinician. The assessment is free and takes about two minutes.

Citations

  • Trauer JM, et al. Cognitive behavioral therapy for chronic insomnia: a systematic review and meta-analysis. Ann Intern Med. 2015;163(3):191–204. doi:10.7326/M14-2841
  • Morin CM, Belleville G, Bélanger L, Ivers H. The Insomnia Severity Index: psychometric indicators to detect insomnia cases and evaluate treatment response. Sleep. 2011;34(5):601–608. doi:10.1093/sleep/34.5.601
  • Edinger JD, 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
  • Espie CA, et al. The attention–intention–effort pathway in the development of psychophysiologic insomnia: a theoretical review. Sleep Med Rev. 2006;10(4):215–245. doi:10.1016/j.smrv.2006.03.002
  • Kapur VK, et al. Clinical practice guideline for diagnostic testing for adult obstructive sleep apnea: an American Academy of Sleep Medicine clinical practice guideline. J Clin Sleep Med. 2017;13(3):479–504. doi:10.5664/jcsm.6506

Frequently asked questions

Difficulty falling asleep is sometimes called sleep-onset insomnia. Difficulty staying asleep is called sleep-maintenance insomnia. Many people have both, and both are part of the definition of insomnia.

Neither is inherently worse. What matters for insomnia is how often it happens, how long it has gone on, and how much it affects your day.

Yes. Pooled across trials, CBT-I reduced the time taken to fall asleep by about 19 minutes and the time spent awake during the night by about 26 minutes.

Brief wakings between sleep cycles are normal and usually forgotten. What turns them into a problem is staying awake afterwards, which is often driven by arousal and worry once you notice you are awake.

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