If smoke bothers your eyes, your best bet is to try to keep away from it. An allergy is your body's overreaction to a substance that it thinks will do it harm. For example, dust is harmless to most people, but some people's bodies will try to flood it out with tears and mucus.
Allergies are often hereditary.
Over 22 million Americans suffer from allergies, and most of those also have allergic conjunctivitis, according to the American Academy of Ophthalmology. Causes Many allergens are in the air, where they come in contact with your eyes and nose. Pollen is one of the most common airborne allergens. Keep your home free of pet dander and dust, and stay inside with the air conditioner on when a lot of pollen is in the air. Air conditioners filter out allergens.