I’m Tired But I Can’t Sleep — What’s Actually Going On
There’s a specific kind of exhaustion that feels borderline offensive.
You’re tired all day.
You finally get into bed. You’re geared up for a good nights sleep…I mean surely tonights sleep will be good, you’re absolutely wrecked….right?
And suddenly your brain decides it’s the perfect time to:
replay conversations from 2007
plan your entire life
or just…stay wide awake for no clear reason
It’s not just frustrating - it makes you feel like you’re doing something wrong. Now you definitely can’t sleep, because you're annoyed about not being able to sleep. Talk about physiological gaslighting (or maybe that’s just me).
But here’s the thing:
If you’re tired but can’t sleep, it’s not a lack of discipline.
It’s usually your biology responding to how you’re living.
Not in a dramatic, “change your whole life” way.
Just in a very quiet, cumulative way that adds up.
Why this happens (without the woo)
Sleep isn’t something you force.
It’s something your body allows - when the conditions are right.
And for a lot of us, those conditions are slightly…off.
1. Your body clock is out of sync
Your circadian rhythm (your internal clock) runs largely on light.
Bright light at night → tells your brain to stay awake
Not enough light in the morning → your body never properly “starts the day”
So by the time night rolls around, your system is confused.
You feel tired…but your brain hasn’t received the signal that it’s actually time to wind down.
2. You’re carrying too much mental load into the evening
Even if you’re physically exhausted, your nervous system might not be.
If your day is full of:
constant decisions
background stress
overthinking
or just never really switching off
Your body can stay in a mild state of alert.
This is the “tired but wired” feeling.
And it’s incredibly common.
3. Your blood sugar is doing its own thing overnight
This one gets overlooked a lot.
If you’re:
under-eating during the day
skipping meals
or having very unbalanced ones
Your body can compensate overnight by releasing stress hormones to stabilise things.
Which…wakes you up.
Usually around 2–3am.
Right on schedule.
4. Life stage matters more than we talk about
If you’re a female in your 40s (or heading there), this part matters.
During perimenopause and menopause, hormonal changes, particularly fluctuations and eventual decline in oestrogen and progesterone, can significantly affect sleep.
Here’s what’s happening, in simple terms:
Oestrogen helps regulate body temperature and supports sleep stability
Progesterone has a naturally calming, sleep-supportive effect
As these hormones fluctuate:
You may wake more frequently during the night
Your sleep can feel lighter or less restorative
Night sweats or temperature sensitivity can disrupt your cycle
You might feel more alert at night despite being exhausted
There’s also an impact on melatonin and cortisol regulation, which can shift your natural sleep-wake rhythm.
So if your sleep has changed and nothing else seems to explain it - it’s not in your head.
Your physiology is literally shifting.
5. You’re unintentionally telling your body to stay awake
Modern life is not designed for good sleep.
Late-night scrolling, bright lighting, constant stimulation…it all sends the same message:
Stay alert. Stay on.
So even when you want to sleep, your body hasn’t been given a reason to.
What actually helps (without overhauling your life)?
You don’t need a 12-step nighttime routine.
You need a few consistent signals your body can rely on.
What can help (practical evidence based advice)
Start with your morning (this matters more than your night)
Sleep starts when you wake up.
One of the most effective things you can do:
Get natural light in your eyes within the first hour of waking.
Not through a window. Outside.
Even 5 – 10 minutes helps set your circadian rhythm so your body knows when to feel awake… and later, when to feel sleepy.
Also:
Try to wake up at roughly the same time each day
Not perfectly. Just consistently enough
It’s not about being strict. It’s about being predictable.
Rethink your caffeine (and alcohol)
Caffeine has a longer half-life than we like to admit.
That mid-afternoon coffee?
It can still be in your system at bedtime.
A simple guideline:
Cut off caffeine about 8 hours before sleep
And alcohol - this one catches people off guard.
It might make you feel sleepy initially, but it:
disrupts your sleep cycles
reduces REM sleep
can increase wake-ups during the night
It also interferes with your circadian rhythm, meaning your overall sleep quality takes a hit - even if you fall asleep faster.
Eat in a way that supports sleep (not fights it)
You don’t need a “sleep diet.”
But balance matters more than people think.
Eat enough during the day
Include protein and carbs in your meals
Don’t go to bed starving
At the same time:
Try to finish eating around 1–2 hours before bed.
This gives your body time to digest properly, so it’s not working overtime when it should be winding down.
So it’s a balance:
under-eating → can wake you up
eating too late → can also disrupt sleep
A steady, consistent approach tends to work best.
Move your body (but don’t punish it)
Regular movement improves sleep quality. Full stop.
It doesn’t need to be intense.
Walking, strength training, anything consistent helps regulate your system.
The only caveat:
If you’re sensitive, very intense workouts right before bed can keep you alert.
Pay attention to what your body does—not what a routine says you should do.
Build a wind-down routine that feels realistic
This is where people overcomplicate things.
You don’t need a perfect routine…you need a repeatable one.
Think of it as a signal, not a performance.
A simple version might look like:
dimming the lights
putting your phone down (or at least making it boring)
doing the same low-effort activity each night (reading, stretching, showering)
A calmer environment genuinely helps your body shift gears.
It’s not just the screen - it’s the stimulation
You already know screens can affect sleep.
But it’s not just the light.
It’s the content.
Scrolling, reading, reacting, thinking - your brain stays engaged.
If your mind feels “on” when you get into bed, this is usually why.
You don’t need to be perfect about it.
Just create a little separation between “online” and “asleep.”
What not to do
This part matters.
Because most sleep advice quietly turns into pressure.
Don’t try to fix everything at once
Don’t expect instant results
Don’t rely on willpower at the end of the day when you’re already exhausted
Sleep improves through consistency, not intensity.
Small shifts. Repeated often.
What I’m focusing on right now
Lately, my sleep hasn’t been great either.
So instead of overhauling everything, I’m keeping it simple:
Getting outside in the morning light
Eating properly during the day (and not too late at night)
Creating a softer, quieter wind-down
Nothing extreme.
Just giving my body a better chance to do what it already knows how to do.
The bottom line
Good sleep isn’t about having the perfect routine.
It’s about giving your body enough signals to feel safe enough to switch off.
And in a world that constantly asks you to stay alert, responsive, and switched on…that’s actually a radical thing to prioritise.
A quick note
This is general, evidence-based information - not medical advice.
If your sleep issues are ongoing, worsening, or impacting your daily life, it’s worth speaking with a qualified healthcare professional to rule out underlying causes.
Some medical conditions that can affect sleep include:
insomnia disorders
sleep apnoea
thyroid imbalances
anxiety or depression
perimenopause and menopause-related changes
restless leg syndrome
Getting proper support can make a significant difference - especially if something deeper is going on.
Don’t ignore it or just push through - this is worth paying attention to, and you deserve proper support.
Wishing you a restful sleep, and a joyful day.
See you next week,
Bec x.