What are the common triggers for hay fever?
Hay fever that occurs in spring is often triggered by pollen from trees. In the summer, it is more likely to be triggered by pollens from grasses or flowering weeds. Other substances that may trigger hay fever all year round include molds, yeasts, dust, chemical fumes, animal hair and pollution.
Author: Lauren Donley
First answered: 10 Nov 2014
Last reviewed: 19 May 2018
Rating: 4.2/5 Votes: 443