Hay fever is one of the most common allergies in the UK. But why do some of us seem to develop the condition out of nowhere?  

Hay fever: why do some develop it as adults? Can it go away?

Strong Women

What happens inside the body when you have hay fever?

Why do some people who have never had hay fever develop it as adults?

Can hay fever go away once it has emerged?

Why do hay fever symptoms vary from person to person and from year to year? 

Plus, why some years feel worse than others.