What types of pollen cause hay fever?
The main types of pollen that cause hay fever in the UK are from trees, grasses and weeds. Grass pollen is the most common trigger. Tree pollen affects people mainly in spring, while weed pollen peaks later in summer.
Key points:
- Tree pollen from birch, oak and hazel causes hay fever from late winter to spring.
- Grass pollen is the leading cause and peaks from May to July.
- Weed pollen from nettles and dock triggers symptoms from June to September.
- Around 30 pollen types can cause hay fever, but most people react to grass pollen.
This text has been fact-checked for accuracy by medino's clinical team.