Stress and sleep: why stress can make it harder to sleep

You can feel exhausted at bedtime and still feel too wound up to sleep. Stress and sleep are closely connected, and the relationship works in both directions. Stress can make it harder to settle down at night, while poor sleep can leave you more vulnerable to stress the next day. Understanding that cycle may make it easier to respond without adding more pressure.

How stress can interfere with sleep

Stress is not only an emotion. It also triggers a physiological response that can make you more alert, increase your heart rate and breathing, and tense your muscles. That response can be useful during a real threat, but worry, distressing memories, or feeling overwhelmed can trigger it even when you are physically safe.

1. It can make falling asleep harder

Stress can interfere with the normal transition into sleep. Cortisol, one of the hormones involved in the stress response, naturally changes throughout the day. Research reviewed in 2023 found that higher nighttime cortisol levels have been linked with shorter sleep duration.

That does not mean cortisol alone explains every difficult night. Rather, changes in the body’s stress response may be one part of why it can feel harder to settle down when you are stressed.

2. It can affect sleep quality

Stress may affect more than how quickly you fall asleep. A 2024 study of 426 university students found that increased stress was associated with shallower or more fragmented sleep and lower overall sleep quality.

Stress may also affect REM sleep, a stage involved in memory processing and emotional regulation. The result can be a night that feels less restorative, even when you spend enough time in bed.

3. It can create a sleep-stress cycle

The connection does not stop when morning comes. Shorter or disrupted sleep can affect positive emotions, thinking, and next-day performance. Those changes may make everyday stress feel harder to manage.

That can create a loop: stress affects sleep, poor sleep adds to stress, and the cycle continues.

How to break the sleep-stress cycle

You may not be able to remove every source of stress, but you can change some of the conditions surrounding sleep.

1. Take some pressure off bedtime

Getting frustrated about not sleeping can add another layer of stress. Instead of blaming yourself or trying to force sleep, it may help to think of bedtime as an opportunity for rest and relaxation.

That shift does not guarantee that you will fall asleep faster. It can simply reduce some of the pressure surrounding sleep.

2. Create a calmer transition to sleep

Making time to relax before bed may help your body move away from the alertness associated with stress. The source suggests relaxing activities such as reading, taking a warm bath, listening to an audiobook, or practicing meditation.

A regular sleep and wake schedule can also help your body establish a consistent rhythm. Keeping the bedroom cool, quiet, and dark may support that routine.

3. Address stress during the day

Stress management does not have to begin at bedtime. Reducing avoidable demands, setting boundaries, or practicing stress-reduction techniques during the day may help limit how much stress carries into the evening.

If stress and sleep problems keep affecting each other, exploring stress and sleep support may also help you understand the pattern and find appropriate next steps.

When ongoing sleep problems deserve attention

Occasional stress or a few difficult nights do not automatically mean something is seriously wrong. But if you frequently cannot sleep, wake repeatedly during the night, or feel unusually sleepy during the day, it is worth talking with a doctor.

Physical conditions and medications can also interfere with sleep, so persistent problems may deserve a closer look. If stress or anxiety feels unmanageable, a doctor or mental health professional can also help you explore appropriate support.

Conclusion

Stress and sleep can influence each other in ways that are easy to overlook. Understanding the cycle may help you stop treating every difficult night as something you need to force yourself out of. A calmer bedtime routine, less pressure around sleep, and attention to daytime stress may help break that cycle over time.

References

References

1. American Psychological Association — https://www.apa.org/
2. National Library of Medicine — https://www.ncbi.nlm.nih.gov/
3. Frontiers in Psychology — https://www.frontiersin.org/
4. CDC — https://www.cdc.gov/
5. NHLBI — https://www.nhlbi.nih.gov/