When a foreign substance such as dust mite allergen enters the body, allergic reactions occur after the body becomes sensitized to these substances. The first time an allergen is inhaled, the body recognizes it as an invading substance. Cells located under the mucus membranes in the nose produce large amounts of antibodies against them. The most common type of antibody associated with pollen is Immunoglobulin (IgE). The next time these allergens invade the body; these antibodies release special chemicals such as histamines to combat them. These substances cause nearby tissues to become swollen and inflamed, triggering all the different kinds of symptoms experienced during Hay fever onset. Common treatment remedies such as anti-histamines help prevent the release of histamine, and consequently prevent the common symptoms.See the full range of our herbal supplements.