Types of rhinitis.

Rhinitis is a familiar disorder affecting up to 20% of the general population. Chronic rhinitis can be broadly classified into allergic, infectious, or nonallergic or noninfectious, which are distinguished mainly by a careful history and allergy testing. The pathophysiology of nonallergic rhinitis likely involves a combination of inflammatory and neurogenic mechanisms that are poorly understood. Treatment involves avoiding the offending agent, when possible, and using appropriate medications to control the patient's predominant symptoms. Published by Elsevier Inc.