Can't fall asleep after 20 minutes? What to do next

Why twenty minutes

Healthy adults take ten to twenty minutes to fall asleep. Past twenty, the odds of dropping off in the next few minutes start to fall rather than rise, because trying to sleep is itself arousing — you check the clock, you calculate, you worry about tomorrow. The guidance used in sleep medicine, part of what is called stimulus control, is to break that loop by leaving the bed. Twenty minutes is an estimate, not a timer: the instruction is to get up when you notice you are awake and frustrated, without watching the clock.

What to do with the time

Somewhere dim, something dull. A chair in another room, a lamp rather than the ceiling light, a book you do not care about, a podcast at low volume. Not the phone: the light is part of it, but the bigger problem is that a screen is interesting. Return to bed when you feel sleepy — heavy eyelids, yawning — rather than at a set time. If sleep does not come again, repeat. It feels wasteful the first few nights and tends to shorten the time awake within a week or two.

Aim for the next cycle, not the one you missed

A night is four to six cycles of roughly 90 minutes. If you planned lights out at 10:45 pm for a 6:30 am alarm and are still awake at 11:15, the next bedtime that ends on a cycle boundary is 12:15 am — four cycles, six hours. That is a short night, but it is a whole-cycle short night, and waking at the end of a cycle is kinder than waking in the middle of one. The bedtime pages list all the options for any alarm.

Sound, used carefully

Steady sound helps some people, mainly by covering the unpredictable noises that keep a tired brain on alert. One small lab study found broadband sound cut sleep-onset time by about 38% in a noisy setting; a 2021 systematic review rated the evidence overall as low quality. So: worth a try, not a cure. Keep it quiet, use a timer so it stops after you are asleep, and pick something that does not annoy you — steady rain sits near pink noise and is the most common choice. The sounds pages describe each kind.

Check the afternoon

If slow nights are frequent, look at the day. Caffeine six hours before bed still cost more than an hour of sleep in the only controlled trial on timing, and the people in it did not notice. A nap after 3 pm that reached deep sleep takes pressure off the night. A bedtime that moves around by an hour or two confuses the clock. The caffeine cutoff pages and nap pages give the numbers.

When it is a pattern

Taking more than thirty minutes to fall asleep three or more nights a week for three months is one of the criteria clinicians use for insomnia, and the treatment with the best evidence is a structured programme (cognitive behavioural therapy for insomnia) rather than any tip on this page. If that is where you are, this site has done what it can; the next conversation is with a doctor.

Questions people ask

Why does getting out of bed help?

Conditioning. Lying awake teaches the brain that bed is a place to be awake; leaving and returning only when sleepy keeps the association between bed and sleep.

Should I look at the clock?

No. Clock-watching raises arousal and turns twenty minutes into arithmetic about how little sleep is left. Turn the clock away; estimate.

Does counting sheep or breathing exercises work?

Slow breathing lowers arousal for some people and is harmless; there is little evidence for any particular technique over another. The point is to stop trying to sleep.