Aaaaaaaaa-choo! If you have hay fever then you know that it can be a right pain in the… nose. This week Inside Health presents a complete guide to hay fever. Are we enduring the worst hay fever season? When was the disgustingly-named “summer catarrh” first identified as a medical condition? And what can we safely plant in the garden without setting off our symptoms? GP Navjoyt Ladher and immunologist Danny Altmann join James Gallagher in the park to talk causes and treatments, and to find out how close we are to having a cure.