Background o Rhinitis is defined as inflammation of the nasal membranes and is characterized by a symptom complex that consists of any combination of the following: sneezing, nasal congestion nasal itching, and rhinorrhea. Allergic rhinitis is the most common cause of rhinitisBackground ⚫ Rhinitis is defined as inflammation of the nasal membranes and is characterized by a symptom complex that consists of any combination of the following: sneezing, nasal congestion, nasal itching, and rhinorrhea. Allergic rhinitis is the most common cause of rhinitis