Why Poor Sleep and Anxiety Often Fuel Each Other

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Written By Rachel Williams

It is two in the morning and your mind will not stop moving.   You are not thinking about anything useful, just replaying the day or rehearsing tomorrow.   The tiredness the next day makes everything feel harder, which somehow makes it even harder to sleep the following night.   This loop is more common than most people realise, and researchers understand it well.

Depression and anxiety are now the most common serious illnesses reported in Australia, and they show up most often in adults under 35 (AIHW, 2023).   That is also the age group the Sleep Health Foundation found losing the most productive hours to poor sleep this year.   The overlap is not a coincidence, it reflects how closely the two conditions are tied together.

The Two Way Link Between Sleep And Anxiety

Sleep and anxiety do not just happen to occur together, they actively feed each other.   An Australian study following young women over nine years found that those who reported sleep difficulties were around four times more likely to develop depression and almost three times more likely to develop anxiety later on (Jackson et al., 2014, cited in AIHW).   Other research estimates that people with insomnia are ten to seventeen times more likely to experience clinically significant depression or anxiety compared with people who sleep well (Thoracic and Sleep Group Queensland, 2023).   A racing, anxious mind makes it harder to fall asleep, and a lack of sleep leaves the nervous system more reactive and less able to manage stress the next day.

This year's Australian Sleep Report, released for Sleep Health Week, found that poor sleep is directly affecting the ability to work or study for almost half of all Australians, with adults under 45 losing the most productive hours (Sleep Health Foundation, 2025).   Sleep Health Week runs this week, from 3 to 7 August, and this year's theme asks Australians to take a closer look at what is actually happening with their sleep (Sleep Health Foundation, 2026).

What This Looks Like Day To Day

  • Lying awake running through worries or what ifs

  • Waking in the early hours and struggling to settle again

  • Feeling wired and exhausted at the same time

  • Relying on caffeine, alcohol or scrolling to get through the evening

  • Noticing your anxiety feels worse after a bad night of sleep

  • Dreading bedtime because your mind knows what usually happens there

None of this means something is wrong with you.   It means your body and mind have learned a pattern, and patterns like this one can be unlearned with the right support.

Why It Is Hard To Break Alone

Most people try to fix the sleep side first, with earlier bedtimes, screen limits or supplements.   These changes can genuinely help, but they rarely work well on their own if the underlying anxiety is left untreated.   Addressing only one half of a two way relationship tends to produce results that do not last.

It is also common to reach for something to switch the mind off, whether that is an extra glass of wine, an over the counter sleep aid or hours of scrolling until exhaustion finally wins.   These habits can bring short term relief, but over time they often make both the sleep and the anxiety harder to shift.   The nervous system needs to learn that it is safe to rest, and that is not something willpower alone can teach it.

Effective support usually needs to look at both sides together.   At Valentia Health, our therapists work with the anxiety driving the sleeplessness and the sleep patterns that are keeping the anxiety going, rather than treating them as two separate problems.   That combined approach is often what makes the difference between a short term fix and a lasting change.

What Actually Helps

There is good evidence for what helps break this cycle, and it usually involves more than one strategy at a time.

  • Cognitive behavioural approaches for insomnia, shown to be more effective long term than medication alone

  • Addressing anxious thought patterns directly, rather than only managing sleep hygiene

  • Building a wind down routine that signals safety to the nervous system, not just darkness and quiet

  • Gradually reducing reliance on caffeine, alcohol or screens as evening coping tools

  • Working with a therapist to understand what is actually keeping your mind switched on at night

You do not have to solve this on your own, and you do not need to wait until things feel unbearable before asking for help.   Valentia Health offers anxiety focused therapy in Taringa and via telehealth across Australia, with Medicare rebates available through a Mental Health Care Plan from your GP.   If sleepless nights and a busy mind have become the norm, this Sleep Health Week is a good moment to reach out at valentiahealth.com.au.

References

This post is for general informational purposes and is not a substitute for professional psychological advice. If you are in crisis, please contact Lifeline on 13 11 14 or call 000.

Rachel Williams
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