Hay fever, also called allergic rhinitis, is a common allergic reaction to certain substances in the air, such as pollen from trees, grasses or flowers. It often occurs in the spring and summer, when the pollen concentration in the air is highest. People who suffer from hay fever have an oversensitive immune system that reacts to these allergens as if they are harmful, when in fact they are not.De symptomen van hooikoorts kunnen onder meer zijn:

• Sneezing
• Itchy or stuffy nose
• Itchy or watery eyes
• Sore throat or cough

Hay fever can range from mild to severe and can affect the daily lives of sufferers, especially if symptoms persist. It can also accompany asthma or worsen in people who already have asthma.

For some people, hay fever is a year-round problem, caused by things like pet dander or dust mites. But most people have symptoms in the spring and summer, when pollen spores in the air are at their highest.