You're absolutely exhausted. You've been looking forward to climbing into bed all day. But the moment your head hits the pillow, your brain suddenly has other plans.
Tomorrow's to-do list. That awkward conversation from last Tuesday. The email you forgot to reply to. And, for some reason, a sudden urge to reorganise your entire life.
Sound familiar?
If you've ever felt tired but wired, you're certainly not alone.
Sleep isn't simply a matter of closing your eyes and switching off. Behind the scenes, your brain, nervous system and hormones are working together to regulate when you feel awake and when you're ready to rest.
And one hormone that often enters the conversation is cortisol.
Commonly known as the stress hormone, cortisol has gained quite the reputation on social media. But is it really responsible for those restless nights? And can you do anything to support a healthier sleep routine?
Let's explore what science actually says.
What Does Cortisol Have to Do With Sleep?
First things first: cortisol isn't the enemy.
In fact, your body needs it.
Cortisol is a hormone produced by your adrenal glands. It plays an important role in regulating metabolism, blood pressure, immune activity and your body's response to stress.
It also follows a natural daily rhythm.
In most people who sleep at night, cortisol levels begin rising towards morning, helping prepare the body for the day ahead. Levels are generally higher around waking and gradually decline throughout the day, reaching their lowest point during the early part of the night.
This pattern is closely connected to your circadian rhythm, your body's internal 24-hour clock.
Think of it as a carefully coordinated daily schedule.
- Morning: Cortisol rises around waking, helping your body prepare for daytime activity.
- Afternoon: Levels generally decrease as the day progresses.
- Evening: Cortisol is typically lower as your body approaches its usual sleeping hours.
- Overnight: Levels remain relatively low early in the night before gradually increasing towards morning.
Of course, these patterns aren't identical for everyone. Shift work, irregular sleeping schedules, illness and other factors can influence the timing of your hormones.
The important thing to understand is that cortisol isn't something we should be trying to eliminate. It's a normal, essential part of how our bodies function.
Why Does Stress Make It Harder to Sleep?
Have you ever noticed how much harder it is to drift off when you have something on your mind?
There's a biological reason for that.
When your brain perceives a threat or challenge, it activates systems involved in your stress response, including the hypothalamic-pituitary-adrenal (HPA) axis.
This system helps coordinate the release of cortisol.
In the short term, that's incredibly useful. It helps your body respond to demanding situations.
The problem is that our brains don't always distinguish neatly between an immediate physical threat and the pressures of everyday life.
Work deadlines, financial worries, family responsibilities and emotional stress can all contribute to a feeling of heightened alertness.
And when you're mentally or physically alert, falling asleep can become more difficult.
Researchers sometimes describe this as hyperarousal, a state in which the systems involved in wakefulness remain unusually active.
It can feel like:
- Being physically tired but mentally wide awake.
- Finding it difficult to stop thinking at bedtime.
- Waking during the night and struggling to drift off again.
- Feeling tense or restless when you're trying to relax.
- Worrying about how little sleep you're going to get.
Stress doesn't affect everyone's sleep in the same way and cortisol is only one part of a much more complicated picture.
But research has consistently found a relationship between psychological stress and disrupted sleep.
And the relationship works in both directions.
The Stress and Sleep Cycle: Why One Bad Night Can Lead to Another
Here's where things become particularly interesting.
Stress can interfere with sleep, but poor sleep can also affect how we respond to stress.
After a restless night, you might notice that relatively small inconveniences suddenly feel like major problems.
The traffic seems more frustrating. Your concentration isn't quite what it should be. You're less patient than usual, and even simple decisions can feel exhausting.
Sleep plays an important role in emotional regulation, attention and how we process everyday experiences.
When our sleep is regularly disrupted, coping with stress may become more difficult.
That can create a frustrating cycle:
And sometimes, the pressure to get a good night's sleep becomes another source of stress itself.
You check the clock.
You calculate how many hours are left before your alarm goes off.
You try even harder to fall asleep.
And somehow, that makes everything worse.
The good news? This cycle isn't inevitable. Understanding what's happening can help you make changes to your routine without placing even more pressure on yourself.
Cortisol vs Melatonin: How Your Body Knows When to Sleep
If cortisol is often associated with alertness, you've probably heard of another important hormone: melatonin.
Melatonin is produced by the pineal gland in your brain and helps signal that it's biological night.
Its production is strongly influenced by light and darkness.
As evening approaches and light levels fall, melatonin typically begins to rise. Exposure to bright light, particularly at the wrong time of day, can affect this process.
Cortisol and melatonin follow different daily patterns, but they aren't simply two hormones battling for control of your bedtime.
Your sleep is also regulated by something called sleep pressure.
The longer you've been awake, the stronger your natural drive to sleep generally becomes.
For a good night's rest, your internal body clock, accumulated sleep pressure and environment need to work reasonably well together.
This helps explain why you can be tired but still struggle to fall asleep.
Your body may need rest, but stress, irregular routines or environmental factors can make switching off more difficult.
7 Natural Ways to Sleep Better
Before investing in complicated sleep routines or the latest wellness trend, it's worth focusing on the basics.
They're not particularly glamorous, but many of the most effective sleep habits are also the simplest.
1. Keep a Consistent Wake-Up Time
A regular sleep schedule is one of the best ways to reinforce your natural circadian rhythm.
Try waking up at roughly the same time each day, including weekends.
You don't need military-level precision, but consistency can help your internal body clock maintain a more predictable routine.
If you've had a bad night, the temptation to sleep until lunchtime is understandable. However, large changes to your wake-up time can make the following night more difficult.
Try this: Choose a realistic wake-up time you can maintain most days of the week.
2. Get Outside During Daylight Hours
Natural light is one of the strongest environmental signals influencing your circadian rhythm.
Getting outside during the day, particularly in the morning, helps your brain distinguish between daytime and night-time.
Even a short morning walk can be a useful part of a consistent daily routine.
And no, you don't need glorious sunshine. Natural daylight is still available on those famously grey British mornings.
Try this: Make a short outdoor walk part of your morning routine, perhaps while enjoying your first cup of tea.
3. Be Mindful of Afternoon Caffeine
We love a good cup of coffee as much as anyone.
But caffeine can remain in your system for several hours after you've finished your drink.
It works partly by blocking adenosine receptors in the brain, temporarily reducing the feeling of sleepiness.
That afternoon coffee might help you power through your emails, but it could also make falling asleep later more difficult.
The NHS recommends avoiding tea, coffee and other caffeinated drinks for at least six hours before bedtime.
Some people are particularly sensitive to caffeine and may benefit from stopping earlier.
Try this: Experiment with switching to caffeine-free drinks after lunchtime and see whether your sleep changes.
4. Create a Wind-Down Routine That Actually Works for You
Not everyone has the time (or patience) for a 12-step evening wellness ritual.
And that's perfectly fine.
A wind-down routine doesn't need to involve candles, expensive skincare or an elaborate collection of herbal teas.
It simply means giving yourself a little space between the demands of the day and going to bed.
That could be:
- Reading a few pages of a book.
- Taking a warm shower.
- Enjoying a caffeine-free drink.
- Listening to relaxing music.
- Doing some gentle stretching.
- Putting tomorrow's to-do list on paper.
The key is finding something realistic enough to repeat.
Try this: Set aside 20–30 minutes in the evening for an activity that helps you move away from work and other stimulating tasks.
5. Make Your Bedroom a Sleep-Friendly Space
Your environment can have a bigger influence on sleep than you might expect.
A room that's too warm, bright or noisy can make it harder to fall asleep and stay asleep.
The NHS recommends keeping your sleeping environment dark, quiet and comfortably cool.
Blackout curtains, an eye mask or earplugs can be useful if your surroundings are difficult to control.
And if you're someone who lies in bed scrolling through social media, consider giving your phone a designated home away from your pillow.
Try this: Make one small change to your bedroom that reduces light, noise or another regular disturbance.
6. Move Your Body During the Day
Regular physical activity has been associated with better sleep and improved general wellbeing.
You don't have to run a marathon or spend an hour in the gym.
Walking, cycling, gardening, dancing or simply moving more throughout your day can all contribute to an active lifestyle.
The most important thing is finding an activity you enjoy and can maintain consistently.
Try this: Add a little movement to your daily routine, even if it's just a short walk after lunch.
7. Stop Trying to Force Sleep
This might sound counterintuitive.
But if you've spent an hour lying awake, getting increasingly frustrated with yourself, trying harder to sleep may not be helping.
Sleep isn't something we can force through determination.
If you're lying awake for a while and feeling increasingly alert or frustrated, the NHS suggests getting up and doing something relaxing until you feel sleepy again.
Keep the lighting low, avoid stimulating activities and return to bed when you're ready.
Try this: Instead of watching the clock, focus on creating a restful environment and allowing sleep to happen naturally.
What About Natural Sleep Remedies and Functional Mushrooms?
Alongside conventional sleep advice, there's growing interest in natural wellbeing routines, herbal drinks and functional mushrooms.
One mushroom that often appears in these conversations is Reishi (Ganoderma lucidum).
Reishi has a long history of traditional use in East Asian cultures and contains a variety of naturally occurring compounds, including polysaccharides and triterpenes.
Scientists have investigated several of these compounds in laboratory and animal studies.
However, it's important to distinguish traditional use and early-stage research from proven clinical benefits.
That doesn't make the research uninteresting. It simply means we need to be careful about the conclusions we draw.
At Mogo Farm, we're passionate about functional mushrooms, but we believe that curiosity about nature should go hand in hand with an honest understanding of the science.
Reishi is one of the mushrooms we grow and extract here in Derbyshire and you can learn more about how we cultivate and prepare it in our Reishi Mushroom Tincture guide .
If you're interested in mushroom extracts, our complete guide to mushroom tinctures also explains the different extraction methods and how liquid mushroom products are made.
Functional mushrooms are not a replacement for healthy sleep habits or appropriate medical treatment, however they can be a fantastic addition to any wellness routine.
When Should You Seek Help for Poor Sleep?
Most of us experience the occasional restless night.
But ongoing sleep difficulties deserve attention.
If you've struggled with sleep for several months, changing your habits hasn't helped, or tiredness is affecting your everyday life, it's worth speaking with your GP.
Sleep problems can have many causes, including stress, medication, underlying medical conditions and sleep disorders.
For persistent insomnia, cognitive behavioural therapy for insomnia (CBT-I) is an established treatment approach.
The Bottom Line: Better Sleep Starts With Understanding Your Body
If there's one thing we'd love you to take away from this article, it's this:
Cortisol isn't a hormone you need to fight, and better sleep isn't something you can force.
Your body already has sophisticated systems for managing alertness, rest and recovery.
Stress, daily routines and your environment can all influence those systems.
And while there isn't one magical ingredient or evening ritual that guarantees eight uninterrupted hours of sleep, small, consistent changes can make a meaningful difference.
Start with the basics.
Make time to unwind. Get outside during the day. Pay attention to your caffeine intake. And try not to turn bedtime into another item on your to-do list.
Sometimes, the best thing you can do for your sleep is to stop making it such a stressful experience.
Frequently Asked Questions
Can High Cortisol Levels Keep You Awake at Night?
Elevated evening cortisol can be associated with disrupted sleep, but insomnia has many possible causes. Difficulty sleeping alone cannot establish that your cortisol is high.
Why Am I Tired All Day but Wide Awake at Night?
Stress, irregular sleep schedules, caffeine, evening light exposure and other factors may contribute. This experience is sometimes described as feeling 'tired but wired'.
How Can I Naturally Improve My Sleep?
Start with a consistent wake-up time, regular daylight exposure, physical activity, a comfortable sleeping environment and reducing late-day caffeine. If sleep problems persist, seek professional advice.
