Both seasonal allergic rhinitis (hayfever) and year around allergic rhinitis (perennial) produce essentially the same symptoms, but with different severities.
The symptoms of hayfever come from a localised allergic reaction in the nose, throat and eyes. Once an allergy to a particular pollen has been established (see ‘How an allergic reaction develops’ for further information), any further contact with it will stimulate the immune system to release histamine and other chemicals. These then act as a trigger for common ‘hayfever’ symptoms such as...
On top of all these symptoms, hayfever sufferers may feel miserable, irritable and listless and many people find their ability to work, drive and enjoy a social life is impaired.