Introduction
Allergic rhinitis, an allergic disease, was called hypersensitive rhinitis in the past. It is the allergic disease of the nasal mucosa. Clinically, the disease mainly manifests as paroxysmal nasal itch, persistent sneezing, nasal obstruction, and clear nasal discharge, etc. The disease may occur in people of various ages, but is most commonly-seen in people at the age of 15 to 40. Children also suffer from allergic rhinitis. Besides, some of them often have allergic asthma. The incidence of the disease is higher in spring and fall.