The Met Office has issued a warning to anyone who suffers with asthma as pollen levels are set to reach even higher levels starting from this weekend.
Pollen counts are reaching very high levels tomorrow in several parts of the UK including Leeds, London and Exeter - and will continue to remain there at the beginning of next week.
In Edinburgh, pollen levels will be high on Sunday, very high on Monday and high on Tuesday, maps shared by the Met Office show.
Charity Asthma + Lung UK warned of the risk of deadly asthma attacks due to high pollen levels, which could leave sufferers fighting for breath.
She said: "If pollen is causing your lung condition to get worse, it's important you get help so you can get on top of symptoms before they get more serious."
The pollen count monitoring network combines Met Office weather data with expertise from organisations such as the National Pollen and Aerobiological Unit.
For most of next week, pollen levels will remain high or very high in most parts of the country, interactive maps show.
High pollen levels also cause hay fever symptoms in those who suffer from the allergy - especially when it comes into contact with their eyes, nose, mouth and throat.
As pollen levels go up, earlier this month a study found that six in ten hay fever sufferers are having to deal with severe symptoms – including facial pain (19%), earache (18%), and even losing their sense of smell (22%).
Common symptoms of the allergy include frequent sneezing (66%), a blocked nose (67%), and red, itchy, or watery eyes (68%).
And three in ten (29%) have taken days off work due to the severity of their symptoms, while the same number have cancelled plans with family or friends, and 16% have even bailed on a date due to hay fever.
But despite 70%, of the 1,500 hay fever sufferers polled, saying they dread the effects of the seasonal allergy, a quarter claim they have been accused of “making it up” – by those who don't experience symptoms.
One in five (19%) feel that those who don't have hay fever are unsympathetic to their ailments.
And 79% have been told by someone fortunate enough to not have experienced the allergy, that it is not a good enough reason to not show up to something.