Medical News Today
By Christian Nordqvist

Childhood allergies have become more widespread around the globe since 1991, according to a large study. The most common allergies are hayfever, asthma and eczema. In the UK, a study of 1,700 children found asthma prevalence went up from 18.4% in 1991 to 20.9% in 2003 - for the same period hayfever prevalence went up from 9.8% to 10.1% and eczema rose from 13% to 16%.