How Pollen and Allergy Season Can Impact Sleep Apnoea

As spring and early summer roll across Australia, many people welcome the warmer weather and blooming landscapes. But for millions of Australians, this time of year also signals the start of allergy season—bringing sneezing, congestion, and disrupted sleep.

For those living with sleep apnoea, the effects of pollen and seasonal allergies can be more than just uncomfortable—they can significantly worsen symptoms and reduce sleep quality.

Understanding the Link Between Allergies and Sleep Apnoea

Sleep apnoea, particularly obstructive sleep apnoea (OSA), occurs when the airway becomes partially or completely blocked during sleep. This leads to repeated interruptions in breathing, often accompanied by snoring, gasping, or choking.

During allergy season, airborne pollen from grasses, trees, and weeds can trigger allergic rhinitis (hay fever). This causes inflammation and congestion in the nasal passages, making it harder to breathe through the nose—especially at night.

When nasal breathing is restricted:

• People are more likely to breathe through their mouth
• Airway resistance increases
• Apnoea episodes may become more frequent or severe

Why Allergy Season Makes Sleep Apnoea Worse

Seasonal allergies can impact sleep apnoea in several ways:

1. Nasal Congestion
Blocked nasal passages reduce airflow and can increase airway collapse during sleep.

2. Inflammation
Allergic responses cause swelling in the upper airway, narrowing the breathing space.

3. Poor Sleep Quality
Itchy eyes, sneezing, and congestion can lead to fragmented sleep, compounding fatigue already caused by sleep apnoea.

4. Reduced CPAP Tolerance
For those using CPAP (Continuous Positive Airway Pressure) therapy, congestion can make it harder to tolerate the mask or maintain consistent use.

Common Symptoms to Watch For

If you experience sleep apnoea, allergy season may intensify symptoms such as:

• Loud snoring
• Increased daytime fatigue
• Morning headaches
• Dry mouth or sore throat
• Difficulty concentrating

If these symptoms worsen during spring or high-pollen days, allergies may be playing a role.

Tips to Manage Sleep Apnoea During Allergy Season

Managing both conditions together is key to better sleep and overall health.

1. Keep Indoor Air Clean
Use HEPA air purifiers and keep windows closed on high pollen days.

2. Shower Before Bed
Rinse off pollen from your hair and skin to avoid transferring it to your bedding.

3. Wash Bedding Regularly
Frequent washing helps remove allergens that accumulate overnight.

4. Use Nasal Treatments
Saline sprays or prescribed allergy medications can reduce congestion and improve airflow.

5. Optimise Your CPAP Therapy
Ensure your CPAP machine is clean, filters are replaced regularly, and consider a heated humidifier to ease nasal irritation.

6. Monitor Pollen Levels
Check local pollen forecasts and limit outdoor exposure when counts are high.

When to Seek Help

If your sleep apnoea symptoms worsen during allergy season or your CPAP therapy becomes difficult to manage, it may be time to speak with a sleep specialist.

At iHeart Sleep, we understand how seasonal factors like pollen can impact your sleep health. Our team can help you optimise your treatment and breathe easier—no matter the season.

Breathe Better, Sleep Better

Allergy season doesn’t have to mean sleepless nights. With the right strategies and support, you can manage your symptoms and enjoy restorative, uninterrupted sleep.