Most people suffering from ear, nose, throat, and allergy symptoms do not know the cause. It is very important for them to know about pollen count in the atmosphere. Pollen is one of the most common allergens and a higher number may cause them to suffer if they are allergic to particular pollen. Allergy symptoms occur when your immune system overreacts to an allergen. Effective treatment of allergy includes identifying and avoiding allergens that trigger symptoms.