Canberra's pollen levels are twice as high this hay fever season compared with last year, according to researchers at the Australian National University (ANU).

Researchers studying pollen have found evidence of a phenomenon known as "thunderstorm asthma" in Canberra.

Symptoms for hay fever sufferers usually ease up by summer, but recent thunderstorms and warm days have released fungal spores into Canberra's skies and it's left many allergy sufferers reaching for the tissue box.

Canberra is on track to break a record of the longest string of days with high and extreme pollen levels and hay fever sufferers be warned - the worst could be yet to come.

Hay fever sufferers across Canberra hate the arrival of fluff tree season in spring although it may not be harming them, according to a pollen expert.

For many, spring is the most agreeable time of year. But for one in six people (around three million Australians), this balmiest of seasons is rendered utterly miserable by allergic rhinitis or hay fever.

A mobile app tracking and forecasting pollen levels has been issued by the Australian National University, designed to help hayfever and asthma sufferers, who can in turn contribute to national research.

Hay fever and asthma sufferers in Canberra will soon be able to receive daily counts and forecasts of pollen levels thanks to a free app released by researchers at The Australian National University (ANU).