ear, nose, and throat disorders
Nonallergic Rhinitis
Chronic rhinitis
Chronic rhinitis is generally a prolongation of subacute (resolved in 30 to 90 days) inflammatory or infectious rhinitis. It may also rarely occur in syphilis, tuberculosis, rhinoscleroma, rhinosporidiosis, leishmaniasis, blastomycosis, histoplasmosis, and leprosy—all of which are infections characterized by granuloma formation and destruction of soft tissue, cartilage, and bone. Nasal obstruction, purulent rhinorrhea, and frequent bleeding result. Rhinoscleroma causes progressive nasal obstruction from indurated inflammatory tissue in the lamina propria. Rhinosporidiosis is characterized by bleeding polyps. Both low humidity and airborne irritants can result in chronic rhinitis. 