Insomnia almost never starts at night — it starts during the day. It is not a problem of “being unable to sleep” but a problem of over-arousal: the nervous system stays switched on long after it is time to rest. CBT-I, the first-line treatment recommended by NICE and the NHS, works by dismantling the things that keep body and mind alert, so that sleep can return naturally — rather than trying to force sleep down.
Most people who come to me for help with insomnia are sure their problem begins at night. They describe the same familiar moment: lying in bed, the light off, the body tired — but sleep won’t come. Then the struggle starts: racing thoughts, clock-checking, trying to “relax”, and often frustration or fear. The less familiar truth is that insomnia rarely begins in the night itself. It begins much earlier — during the day.
Why is insomnia really a problem of over-arousal?
Insomnia is not really an inability to sleep; it is a state of over-arousal. The nervous system stays alert even when it is time to rest. The body may be tired, but the brain is still on “standby”. Many things can keep that arousal switched on: ongoing stress, emotional load, anxiety, intrusive thoughts, attempts to control sleep, and everyday habits that don’t seem connected to the night at all — yet affect it greatly.
Why doesn’t trying harder help?
One of the most common mistakes is to think that if we “just try harder”, sleep will arrive. But sleep doesn’t respond to effort. The more we try to control it, the further it retreats. This is exactly where CBT-I differs from general tips or quick fixes: it doesn’t try to “knock you out”. It works on dismantling the factors that keep the body and mind awake, and lets sleep return on its own.
What does treatment actually work on?
In CBT-I we learn to identify:
- Which thoughts are holding the arousal in place
- Which habits are strengthening insomnia without our noticing
- How to recreate the conditions in which sleep becomes automatic again
And here is an important point: insomnia is a reversible condition. Even if it has lasted months or years, that doesn’t mean something has “broken” in the brain or body. It means a pattern has formed — and patterns can be changed.
When should you pause and look more closely?
If you feel that your sleep has become a struggle, that the night is running you, or that tiredness is already affecting your day, it is worth pausing to look at what is really going on. For chronic insomnia, CBT-I is recommended by NICE and the NHS as the first-line treatment, ahead of sleeping tablets — and it works precisely because it addresses what is happening during the day, not just at night.