Article: What on earth is... hay fever?; Red, sore eyes, sniffles, sneezes - we know the symptoms but why do we get hay fever? Why is it that the best season of the year is blighted by this pesky allergy?(News)

Does hay fever mean you're allergic to hay?

Don't be silly. It's the allergic response to pollen from trees, grasses or weeds.

What are allergies?

Allergies occur when the immune system overreacts to otherwise harmless foreign substances, called allergens. When an allergen enters the body, the immune system signals special cells - "mast cells" to release a ...

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