Some sceptical people say that there isn't a real increase in allergies - it's just down to an increase in diagnosis. I am sure that to some extent this is true, but when I was young I don't remember anyone having eczema (apart from me). The situation has changed. I've posted an article on our health and happiness web site about the increase in allergy symptoms.
While you're there take a look at a self-help allergy treatment technique.