To manage seasonal allergies effectively, patients should begin antihistamines or nasal steroid sprays approximately two weeks before pollen exposure starts. According to Boots director of pharmacy Caoimhe McAuley, preventative treatment works better than using medication as a rescue remedy once symptoms like sneezing or itchy eyes have already developed.
How can you distinguish a seasonal allergy from a common cold?
Distinguishing between a viral infection and allergic rhinitis depends on specific clinical signs. A cold typically begins with a sore throat and develops into thick or colored mucus, often accompanied by body aches or a low-grade fever. These symptoms generally resolve within seven to ten days.

In contrast, allergies are characterized primarily by itchiness. McAuley notes that itchy eyes, nose, throat, or ears are classic indicators. Allergy sufferers also experience persistent, clear, watery nasal discharge and sneezing that can last for weeks rather than days.
Environmental factors serve as another diagnostic clue. If symptoms fluctuate based on your surroundings—such as worsening on windy days or when outdoors, but improving indoors with windows closed—it is likely an allergy rather than a virus.
When is the best time to start allergy medication?
Waiting until you are actively sneezing to take action often results in delayed relief. McAuley recommends starting seasonal allergy medications as a preventative measure. This approach is particularly important for nasal steroids, which require a build-up period to work effectively.
By starting treatment before the peak of the season, you can stabilize your body’s response to environmental triggers. This is more effective than attempting to use antihistamines as a “rescue remedy” once the inflammatory response is already underway.
What are the primary pollen triggers in Ireland?
The Irish pollen season is characterized by its length and variety of triggers. Tree pollens, including birch and ash, represent the first wave, often beginning to flower as early as March.

Grass pollen is the most significant culprit for the majority of sufferers. This pollen typically peaks during June and July, but McAuley warns that it can linger in the environment well into September and October.
Frequently Asked Questions
Most common colds resolve within seven to ten days.
Nasal steroids are intended for prevention and may take several days to kick in; they are not intended as immediate rescue remedies.
Windy conditions can increase the concentration of airborne pollen, making it easier for allergens to enter your airways.
Do you struggle with the long Irish pollen season? Share your management tips in the comments below or subscribe to our newsletter for more health insights.