The second common trigger allergy is animal. How to treat and prevent the symptoms from pet allergy: - Avoid being around dogs and cats; if you have a pet at home, take specific steps to limit exposure. - Nasal sprays, antihistamines and bronchodilators can help relieve symptoms. - Consider allergy shots (immunotherapy). If the symptoms did not reduce, I recommend you to visit allergist such as: Dr. William Gemeier - best allergist in delaware.http://www.aacdel.com/DrGeimeier.html