Why does your body react to pollen/hayfever in the first place?
- Mar 31
- 4 min read
What’s actually going on with hay fever – and why the reaction can be stronger than it needs to be
Hay fever is something a lot of people across Australia deal with, especially during spring when grass pollen kicks off.
But one question comes up again and again:
Why does the body react to pollen when it’s not actually harmful?
To understand that, it helps to look at how the immune system and nervous system work together.
Quick answer
Your body reacts to pollen because the immune system mistakes it for a threat. That sets off a response where histamine is released, which is what causes hay fever symptoms.
So what actually is pollen? (Hay fever)
Hayfever consists of pollen, which is made up of tiny particles released by trees, grasses and plants as part of their normal cycle.
In Australia, grass pollen is a major trigger — especially on warm, dry, windy days.
For most people, breathing it in does nothing.
But for others, the body treats it like something it needs to fight off.
That’s where the reaction starts. Even when it really isn't needed.
Whats going on in your body during hayfever
When your body reacts to pollen, it goes into defence/threat mode:
The immune system switches on
Antibodies (IgE) are produced
Histamine gets released
The lining of your nose and eyes becomes inflamed
That’s what leads to:
a runny or blocked nose
itchy, watery eyes
sneezing
that drained, tired feeling
So it’s not really the pollen causing the problem — it’s how your body responds to it.
Why does the body overreact??
There’s no single cause. It’s usually a mix of things:
Genetics
Some people are simply more prone to allergies.
Environment
Air quality, lifestyle and how often you’re exposed to pollen all play a role.
Stress and load on the body
This is a big one.
A lot of people notice their hay fever gets worse when they’re already run down, stressed or overloaded.
The body tends to react more strongly when it’s under percieved threat/pressure.
Where does the nervous system come in?
Your body isn’t just a bunch of separate systems doing their own thing.
The nervous system and immune system are constantly interacting.
What we know is:
the nervous system can ramp reactions up or calm them down
stress can increase inflammation
how the body interprets something as a “threat” actually matters a great deal
So hay fever isn’t just about pollen levels — it’s also about how your body is responding overall.
Why can hay fever get worse over time?
A lot of people say:
“It used to be mild, now it’s worse”
“It starts earlier every year”
One reason is that the body can get used to reacting in a certain way.
The response becomes more automatic.
It can kick in faster, feel stronger, and happen with less trigger than before.
What does that mean in real life? and for you?
Hay fever is absolutely a physical reaction — it’s real for sure.
But:
How strong that reaction is can vary depending on what’s going on in the body as a whole!
That’s why:
some days are worse than others
some seasons hit harder
and people experience it differently
Can you actually change how your body reacts?
Because hay fever involves both the immune system and the nervous system, there’s room to influence how the body responds.
Approaches that work with automatic responses — like hypnotherapy — focus on how these reaction patterns are triggered.
It’s not about removing pollen.
It’s about how your body responds to it. It’s completely natural.
For some people, that means less symptoms.
For others, it’s about breaking a pattern that keeps repeating each season
👉 Learn how the CE Pollen Reset method may make a difference
👉 Read more about hypnotherapy for hay fever here
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Want to dig deeper?
👉 Learn more about hay fever and how the body responds
Common questions about hay fever
Why does the body react to pollen?
Because the immune system mistakenly treats it as a threat, which triggers a response involving histamine.
What’s actually happening in the body?
The immune system activates, histamine is released, and inflammation causes typical hay
fever symptoms. Can hypnotherapy help with hay fever?
In general, yes. Because hay fever involves both the immune system and the nervous system, approaches like hypnotherapy focus on how the body’s automatic responses are triggered.
This doesn’t remove pollen from the environment, but it can help the body respond differently to those triggers.
Why is hay fever worse some days?
Pollen levels, weather, stress and how your body is coping overall can all affect symptoms.
Can stress make hay fever worse?
Yes — stress can increase inflammation and make the body more reactive.
