Key Points
- Hay fever (seasonal allergic rhinitis) occurs when the immune system reacts to pollen, particularly from grasses, irritating the nose and eyes.
- Asthma can be triggered when fragments of pollen enter the lungs, leading to coughing, wheezing, and difficulty breathing.
- One in four Australians experience hay fever, while about 10 per cent live with asthma—making respiratory allergies the nation’s most common allergic condition.
- GPs and pharmacists can provide advice on treatments and medications to relieve and prevent symptoms.
What are seasonal allergies?
The arrival of spring means grasses, trees, and plants release pollen into the air. For those sensitive to pollen, this triggers immune responses that lead to hay fever or asthma.
Respiratory and allergy physician Adjunct Associate Professor Joy Lee, Co-Chair of the Respiratory Allergy Stream at the National Allergy Centre of Excellence, explains:
“Grass pollen is a major cause of allergic rhinitis, also known as hay fever, and seasonal allergic asthma. Together, these are known as respiratory allergies. About a quarter of the Australian population are affected by hay fever and about 10 per cent by asthma. The two conditions often coexist, so if you have one, you have a higher risk of having the other.”
In south-eastern states like Victoria, New South Wales, and the Australian Capital Territory, introduced ryegrass is a leading cause of hay fever, with pollen seasons running from September to January, peaking in November.
“In other parts of Australia, like Queensland for example, there may be more tropical grasses and they may have later pollen seasons through summer to February and March,” Professor Lee says.
Dr Duncan Mackinnon, Micaela Diaz, Professor Joy Lee.
What are the common symptoms of hay fever and asthma?
Typical hay fever symptoms include:
- Sneezing and a runny nose
- Itchy, watery eyes
- Blocked sinuses and headaches
- Fatigue
If pollen particles reach the lungs, asthma symptoms can occur:
- Persistent coughing
- Wheezing
- Shortness of breath
- Chest tightness
Brisbane resident Micaela Diaz describes the impact:
“The symptoms are quite chronic. They can actually leave me housebound and range from really itchy skin and hives, to sneezing and coughing, and a lot of sinus symptoms, blocked nose, itchy watering eyes, which kind of makes you look like a bit of a zombie sometimes.”
A mother and son are sitting together in a living room. She is helping him take his puffer because he suffers from asthma. Credit: FatCamera/Getty Images
How can you manage seasonal allergies?
For many, springtime allergies can feel overwhelming. But with preparation, symptoms can be managed.
Micaela shares her strategies: “When we’re coming towards spring, it’s making sure I have the right medications on deck… and little things like changing when or where I open my windows depending on the wind. Washing clothes inside or taking sheets to a laundromat to dry instead of hanging them out. It’s all about minimising that risk.”
What medical treatments are available for hay fever and asthma?
GP Dr Duncan Mackinnon from regional NSW says respiratory allergies make up a quarter of his clinic’s workload during spring and summer.
“Most of this is treatment with over-the-counter medications. The important thing is teaching people to manage their conditions themselves.”
Dr Mackinnon lists some of the treatment options available, which include:
- Antihistamines (tablets or sprays) for quick relief of hay fever
- Decongestants (short-term use only) to ease blocked noses
- Ventolin inhalers for asthma relief
- Preventative corticosteroids (nasal sprays or inhalers) to reduce inflammation—best started before peak season.
There are a variety of diagnostic tests and treatments available for allergies, depending on the severity of symptoms.
“You can get a referral to see a specialist, like an allergist, or immunologist, where we can do more specific testing, like skin prick testing for example, checking different allergen sensitisation,” Professor Lee says.
What is immunotherapy?
Immunotherapy is a treatment that gives you small doses of the allergen causing problems so your immune system can get used to it. As Professor Lee explains: “We give it to people in small doses to try and get the immune system instead of having that overreaction when it's exposed to the allergen, to become what we call desensitised or more used to it.”
Close-up of a car windshield covered in pollen and flower petals - the accumulation of allergens during the spring season. Source: iStockphoto / Manuel Milan/Getty Images
Can the weather affect allergies?
Yes—pollen counts vary daily and are affected by weather. Forecasts are available online and via mobile apps, rating days as mild, moderate, severe, or extreme.
Thunderstorms can also worsen allergies, leading to thunderstorm asthma.
Dr Mackinnon warns: “It’s a perfect storm—humidity, warmth, season, and wind. It causes a massive release of pollen into the air. For susceptible people, this can be dangerous.”
On high-pollen days or during storms, Dr Mackinnon recommends:
- Keeping windows and doors closed
- Avoiding outdoor exposure
- Wearing sunglasses or a mask if outdoors
How can you prepare a management plan for seasonal allergies?
Preparation is key. Professor Lee advises: “If you have a history of symptoms during this time, it’s worthwhile having a chat to your GP so you can have a plan in place.”
A management plan may include:
- Starting preventer medication early
- Having reliever treatments ready
- Monitoring pollen forecasts daily
Despite her struggles, Micaela stays positive:
“It’s frustrating… but it’s okay—you’re not alone. You can manage it, you can get through it. It just takes time to learn what works for you.”
Helpful resources for allergy sufferers
The information contained in this episode is general and is not specific advice. If you are concerned about hay fever, asthma or allergy symptoms, you should seek medical advice from your doctor or pharmacist for accurate information relevant to your situation. In an emergency, call triple zero (000) immediately.
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