If you thought that it's hay fever that's causing you untold misery day and night at the moment, you may be wrong.
According to one allergy expert, Britain's current hot, cold and wet weather cycle is currently triggering a condition which affects millions of people across the country - and it's called 'thunder fever'.
Hay fever sufferers are being hit hardest by the affliction which is said to happen when rain brings pollen back down to earth "in bucket loads".
Airborne allergy specialist Max Wiseberg also terms the condition "upside down hay fever" – because sufferers struggle on wet days rather than hot days.
Thunder and lightening split irritant pollen into smaller, more potent fragments – a type of "super pollen", Mr Wiseberg claims.
There are 18 million people hay sufferers in Britain – of which 15 million claim to suffer from disrupted sleep because of the condition.
There are 18 million hay fever sufferers in the UK
Hay Fever sufferer Max Wiseberg insists storms can make thunder fever symptoms worse
All 15 million claim lack of sleep affects their performance the following day.
Mr Wiseberg said: "Thunder storms can make it even worse - I call it thunder fever and the pollen comes back in bucket loads.
"So your hay fever happens at the wrong time. It's upside down hay fever."
Rain drops carry the pollen back down to earth "in bucket loads"
Some 55% of hay fever sufferers report wheezing, shortness of breath or a tight chest as symptoms for either themselves or their children.
When it came to actual symptoms, 84% report sneezing, 78% runny nose, 80% itchy, watery, red, swollen or sore eyes, and 78% get nasal congestion.
Mr Wiseberg, a hay fever sufferer himself and inventor of the organic hay fever barrier HayMax, added: "The best way to deal with hay fever is to avoid the pollen when you can.
15 million hay fever sufferers say they struggle with a lack of sleep
"So wherever you go, whatever time it is, if you carry with you a small pot of allergen barrier balm, you can pop it on your nose and around your eyes wherever you are, whatever time it is, and that'll stop a whole load of pollen going up your nose."