Hay fever numbers surge during UK heatwave
14 May 2011 Last updated at 07:25 BST
The hot weather in April has triggered a surge in the number of people suffering from hay fever.
Allergy UK say this year has been "particularly bad" and they're warning the combination of tree and grass pollen could cause problems for young sufferers who are about to sit their exams.
Aisling McVeigh reports.