What triggers a hay fever flare-up?
Hay fever flare-ups are triggered by contact with allergens such as pollen from trees, grasses, and weeds, as well as house dust mites, pet dander, and mould spores. Air pollution can make these triggers worse by increasing sensitivity to them. These allergens cause the immune system to react when breathed in or touched.
Key points:
- Pollen from trees, grasses, and weeds triggers most flare-ups, especially in spring and summer.
- Indoor allergens like house dust mites, pet dander, and mould spores can cause year-round reactions.
- Air pollution worsens symptoms by making pollen more irritating.
- Weather such as warm, dry days with wind spreads pollen further.
This text has been fact-checked for accuracy by medino's clinical team.