Histamines cause throat allergy symptoms

Allergens cause the production of immunoglobulin E and when they are overproduced, chemicals like histamines cause inflammation and the typical throat allergy symptoms. This is how the immune system becomes misguided and primed to cause an allergic reaction when stimulated by an allergen.
Hay fever (allergic rhinitis) is the most common of the allergic diseases. Year round or perennial allergic rhinitis is usually due to indoor allergens, such as dust mites or molds. Throat allrgy symptoms result from the inflammation of the tissues that line the inside of the nose (mucus lining or membranes) after allergens are inhaled. Adjacent areas, such as the ears, sinuses, and throat can also be involved.