Beschreibung
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Hay fever is one type of allergic rhinitis which is caused by grass pollens. It occurs when an individual with sensitive immune system inhales pollens from hay grasses and causes sneezing, itchy and watery eyes, swelling and inflammation of the nasal passages, and an increase in mucus production. Symptoms vary in severity between individuals and very sensitive people can experience hives or other rashes.
