If this treatment turns out to be safe and effective, it will have several advantages over the injections. The first, of course, is convenience. More important, however, the nasal spray will affect only those parts of your body that develop the allergic symptoms. However, there are many other substances floating in the air that can lead to similar allergic reactions. These include molds, animal dander, and dust.
Molds are the funguses that cause food to get moldy and closets to smell of mildew.
They are invisible to the naked eye and reproduce with wind-borne spores. If you have an allergy to these spores, you will react to them with symptoms that are like those of hay fever . The tiny scales animals shed from their skin , hair, or feathers are called dander. If you are allergic to a pet, you are reacting to its dander. The symptoms you feel are likely to be the same as those of hay fever .