Clinically also known as seasonal rhinitis, hay fever is an allergic reaction to pollen from grass, trees and weeds. Symptoms are typically seasonal, according to the early spring and summer months, with the worst symptoms occurring between March and September. However, it can sometimes present as all year round symptoms (perennial) for some.
Common symptoms of hay fever include sneezing, itchy and watery eyes, swollen eyes, blocked and congested nose, itchy and runny nose and sometimes an itchy throat/roof of the mouth.