When Hormones Are Running the Show
Some days everything feels harder. Here's why — and what actually helps.
Some days you wake up and everything feels harder.
Your toddler asks the same question for the tenth time, and you want to scream.
Your baby clings to your leg while you're trying to make lunch.
The noise feels louder. Your patience feels thinner.
And nothing has actually gone wrong.
That's hormones.
They're running quietly in the background, shaping how you feel and how you respond — often without you even realising it.
You're Not a Bad Parent. You're Human.
I notice it in myself.
When my blood sugar drops, so does my patience.
When my monthly cycle comes around, my capacity for clinginess, constant questions, or overtired children shrinks noticeably. I feel on edge. I crave space and quiet.
The same situations that I'd handle with relative ease on a good day feel like too much on that day.
That doesn't make me a bad parent.
It makes me human.
And recognising that distinction — between a bad parent and a human having a hard hormonal day — is one of the most useful things I ever learned.
What's Actually Happening: Cortisol
One of the biggest players in how you feel as a parent is cortisol — our stress hormone.
Cortisol rises when:
Life feels overwhelming
The to-do list never ends
You haven't slept properly in weeks (or months)
You're not eating well
You have no time to yourself
You're navigating a difficult season
When cortisol is high, everything feels bigger.
The toddler who asks the same question ten times feels unbearable rather than just repetitive. The crying that you'd normally soothe with ease grates on your last nerve. The noise that's always there suddenly feels like it's pressing in from every side.
This is not a character flaw. It's a physiological response.
Understanding that doesn't make the feeling go away. But it does mean you can respond to it differently — with information rather than guilt.
Your Children Have Cortisol Too
Here's where it gets really useful for parenting:
Your children have cortisol too.
When they're overtired, their cortisol spikes.
That's why an exhausted child often fights sleep instead of falling into it — their body is wired, not calm.
That's why an overtired toddler melts down over the wrong colour cup.
That's why a tired preschooler can't regulate their emotions the way they normally can.
Overtiredness doesn't just make children sleepy. It makes everything harder.
And knowing that, you can start to spot the pattern: the late nap that leads to the chaotic evening. The early waking that makes the whole day harder. The missed bedtime window that results in tears over nothing.
Sleep isn't just about rest. It's about cortisol — and all the behaviour, patience, and emotional regulation that sit on top of it.
This is why I talk about sleep so often in the context of child development. It's not separate from emotional wellbeing. It's the foundation of it.
And Then There's Oxytocin
It's not all stress hormones — and this part matters too.
Oxytocin is sometimes called the connection hormone, or the love hormone.
It's released through:
Touch
Holding your child close
Cuddles and skin-to-skin contact
Eye contact
Even just sitting together quietly
These small acts of connection don't just feel good. They actively lower cortisol. They increase your capacity. They gently guide your nervous system — and your child's — back toward calm.
This is part of why the response to a hard parenting moment that's driven by connection often works better than one driven by distance.
Not always. There are absolutely times when stepping away is the right call (see the breathing post). But when you're feeling dysregulated — stretched thin, impatient, on edge — moving toward connection rather than away from it can shift things faster than you'd expect.
A cuddle isn't just comfort. It's chemistry.
The Days When Everything Feels Personal
There's another hormonal pattern worth naming — one I noticed repeatedly over the years with my own five children:
Some days, their behaviour seemed worse.
More defiant. More clingy. More relentless.
And then I'd realise — usually later, with some distance — that the behaviour wasn't actually worse.
My capacity was lower.
Usually because I was tired. Or my cycle was in a harder phase. Or I hadn't eaten properly. Or I'd had no time to myself in too many days in a row.
And without realising it, I'd been a bit sharper, a bit less patient — and they were simply reflecting that back to me.
Children pick up on our state. They co-regulate with us. When we're regulated, it's easier for them to be regulated. When we're running on cortisol, that transmits too.
This isn't to load you with more guilt. It's the opposite.
It's to help you understand that when days feel hard — when you feel thin and short and unlike yourself — there is often a biological reason. And the most useful response isn't to push harder. It's to rest, reset, and reconnect.
Biology vs. Willpower
Here's one of the most freeing realisations I've ever had in parenting:
Biology plays a bigger role than willpower ever could.
You cannot willpower your way through high cortisol.
You cannot decide, through sheer determination, to have more patience on a day when you haven't slept, haven't eaten, and are mid-cycle.
The body doesn't work that way.
What you can do is:
✅ Notice. "I'm running low today. That's hormones, not failure."
✅ Lower the bar on yourself and your expectations for the day.
✅ Eat something. Blood sugar matters more than most parenting books will ever tell you.
✅ Move. Even a short walk changes your hormonal state more than you'd think.
✅ Rest when you can. Not because you've earned it. Because your body needs it.
✅ Ask for help. Another adult taking the children for an hour is not weakness. It's one of the most effective hormonal interventions available to you.
✅ Connect. Even a five-minute proper cuddle with your child can shift the state of a hard day.
Understanding your hormones means working with your body instead of fighting it.
When to Be Particularly Kind to Yourself
There are seasons of parenting where hormones are running especially hard:
The postpartum period. The hormonal drop after birth is enormous. Sleep deprivation compounds it. If you feel more emotional, more reactive, more unlike yourself in those early months — this is part of the reason.
Monthly hormonal shifts. The week before your period is often harder. Lower serotonin, higher cortisol, less emotional buffer. Planning a quieter week if you can isn't indulgent — it's intelligent.
When sleep has been consistently disrupted. Even a few bad nights stack up. Sustained sleep deprivation raises baseline cortisol significantly.
Illness or recovery. Your body is directing resources elsewhere. There's less available for patience.
In all of these seasons: lower the bar. Be kind. Get through the day.
Understanding Is Compassion
Understanding hormones doesn't mean we excuse unhelpful behaviour — in ourselves or in our children.
A hard hormonal day doesn't mean anything goes.
But it does mean we respond with more compassion.
For ourselves: "I'm struggling today and there's a reason. I'm going to be kind to myself and do what I can."
For our children: "They're overtired and their cortisol is spiking. This isn't defiance — it's biology. Let me respond to the state they're in."
That shift — from judgement to understanding — changes everything about how a hard day unfolds.
A Final Word
The fact that you're reading this — thinking about your hormones, thinking about your children's, trying to understand the invisible forces shaping your hardest days — already says something.
You're paying attention. You care.
Some days will still be hard. Some days you'll still lose your patience more than you'd like.
But on those days, you now have something useful to reach for:
Not guilt. Not a harsh inner critic.
Just information. And a little more compassion.
Sleep is at the heart of hormonal regulation — for you and your child.
📖 Download my Free Sleep Signals Guide — Spot tired cues before cortisol takes over [link]
🌙 Get my Confident Sleep Guide — Because calmer nights genuinely lead to calmer days [link]
💬 Need personalised support? Message me on WhatsApp [link]
You're doing this right. 💙
Related Posts:
When Emotions Are Running High and You Want to Escape [link]
When Stress Builds and You Need to Let Something Go [link]
One Bad Night Doesn't Undo Your Progress [link]
Baby Sleep Schedule by Age [link]
About Christina
I'm Christina, mum of five (now aged 16–22), infant sleep coach, primary school teacher, and class leader for Tots Play developmental classes in Peterhead, Aberdeenshire.
Hormones have shaped some of my hardest parenting days — and understanding them changed how I responded to both myself and my children. Biology isn't an excuse. But it is an explanation. And explanations are where compassion starts.