Severe hay fever is an unpleasant allergic condition that can be a real problem for extreme sufferers, especially in certain parts of the UK where the allergen count tends to be high-whether it is flower pollen (such as rapeseed) or tree pollen (such as silver birch).

Know more: Severe hay fever is an unpleasant allergic condition that can be a real problem for extreme sufferers, especially in certain parts of the UK where the allergen count tends to be high-whether it is flower pollen (such as rapeseed) or tree pollen (such as silver birch).