Why Does My Child React So Strongly? Understanding the Behaviour Beneath the Behaviour in ADHD

Why do some children react so strongly to everyday situations? Discover how ADHD development, emotions and the thinking brain influence behaviour, and how understanding comes before change.

Why Does My Child React So Strongly?

"Why does my child go from calm to overwhelmed in seconds?"

It's one of the questions I hear most often from parents. Perhaps you've asked your child to put their shoes on before school, switched the television off, or said they couldn't have another biscuit. To you, it feels like a small everyday moment. Yet suddenly your child is crying, shouting, refusing, or completely overwhelmed.

It can leave parents feeling confused, exhausted and wondering what they've done wrong.

But what if the behaviour you're seeing isn't the beginning of the story?

What if it's actually the end?

Understanding what happens before behaviour is one of the biggest shifts we can make when supporting young children with ADHD. When we begin to understand what's happening inside their developing brain, those big reactions often start to make much more sense.

Behaviour Is What We See – Not Where It Begins

When children react strongly, our attention naturally goes to the behaviour.

They're shouting.

They're crying.

They're refusing.

They're pushing another child; that's the part we can see.

But behaviour is the outcome of everything that has already happened inside the child.

Before the behaviour came:

• thoughts

• emotions

• body sensations

• previous experiences

• the child's interpretation of the situation

• and the stage of development of the thinking parts of the brain.

Instead of asking,

"Why did my child behave like that?"

we can begin asking,

"What happened before the behaviour?"

That small change in perspective often changes everything.

The Emotional Brain Reacts First

One of the reasons children with ADHD can react so strongly is that ADHD is a neurodevelopmental condition. The areas of the brain responsible for planning, organising, weighing up situations and controlling impulses continue developing more slowly than in many other children. Meanwhile, the emotional parts of the brain react incredibly quickly.

Imagine a child happily playing with their favourite toy.

Another child picks it up.

Immediately, the emotional brain notices.

"I don't like this."

"I want it back."

Those feelings arrive almost instantly.

Normally, the thinking part of the brain begins catching up.

It helps us pause.

Think.

Consider another possibility.

Perhaps ask politely.

Perhaps wait.

Perhaps play together instead.

But when those thinking skills are still developing, the emotional response can remain in charge for longer. The behaviour we eventually see is often the result of that emotional reaction staying in the driving seat.

Children Aren't Born Understanding Their Feelings

Young children don't arrive in the world knowing words such as:

• disappointment

• frustration

• jealousy

• 
  

  embarrassment

• rejection

• fairness

Those ideas develop gradually through thousands of everyday experiences.

As adults, we often forget how much emotional understanding we've built over decades.

Children simply know that something feels uncomfortable. If their emotional development is taking a little longer, they may need more time and more experiences to understand exactly what they're feeling and why. That's why development matters so much.

Every Experience Builds a Filing Cabinet

One of my favourite ways to explain this is to imagine your child's brain as a filing cabinet. Every experience they have is filed away. Some experiences are tiny little notes. Others become huge files sitting right at the front.

What decides which is which?

Emotion.

The stronger an experience feels to the child, the larger the file becomes. Weeks later, when something similar happens, the brain doesn't begin again.

It opens the filing cabinet.

It searches for a similar experience.

It remembers how that felt.

Then it reacts.

This is why two children can experience exactly the same event yet respond completely differently.

They aren't opening the same filing cabinet.

They're opening their own.

It's Often Not About the Shoes

Parents often laugh when I use this example.

You simply say,

"Come on, let's put your shoes on."

To us, that's exactly what it means.

Shoes.

Time to leave.

Simple.

But to your child it may involve:

• stopping an enjoyable activity

• remembering where the shoes are

• changing focus

• organising themselves

• thinking about leaving the house

• coping with the feeling of transition

Or perhaps the request itself creates feelings of pressure or anxiety.

Suddenly, putting shoes on isn't just about shoes.

It's about everything their brain is processing in that moment.

Understanding Doesn't Mean Removing Boundaries

This is something I think is really important.

Understanding behaviour does not mean allowing children to do whatever they like.

Children still need:

• boundaries

• guidance

• routines

• opportunities to learn

• clear expectations

But when we understand what sits underneath the behaviour, we're much better placed to teach the skill the child is still developing instead of only reacting to the behaviour itself.

So What Actually Helps?

Rather than trying to fix children, we can help them gradually build the skills that support emotional development.

These include:

• 

  emotional language

• self-awareness

• body awareness

• flexibility in thinking

• learning to pause before reacting

Children build these skills through everyday life.

Through conversations.

Through stories.

Through games.

Through modelling.

Through repeated experiences.

Not in one big lesson.

But in hundreds of tiny moments over many years.

Every time we help a child recognise a feeling, recover from disappointment or reflect on an experience, we're helping them add something new to their own filing cabinet.

Over time, those new experiences begin replacing older ones.

That's development.

Looking Beyond Behaviour

Perhaps the biggest shift we can make as parents is moving from asking:

"How do I stop this behaviour?"

to asking:

"What understanding is my child still building?"

When we do that, behaviour begins to look very different.

Instead of seeing defiance, we may see delayed emotional understanding.

Instead of seeing stubbornness, we may see a child whose emotional brain is still waiting for their thinking brain to catch up.

That doesn't remove the challenges.

But it helps us respond with greater understanding while continuing to teach the skills our children need.

Because children don't build emotional understanding in one conversation.

They build it through everyday life.

One experience.

One story.

One conversation.

One opportunity at a time.

Continue the conversation

If this article resonated with you, you might also enjoy:

• 🎙️ Listening to the full podcast episode: Why Does My Child React So Strongly?

• 📚 Exploring the Casper & Bentley storybooks, designed to help young children develop emotional understanding through stories and play.

• 🤝 Learning more about the Parent Support Sessions, where we explore your child's unique development together.