Rhinitis, in which the classification by etiology may be allergic or non-allergic, is a disorder characterized by inflammation of the mucous membranes lining the nasal passages. The symptoms of allergic rhinitis, which can be difficult to accurately distinguish from those of vasomotor rhinitis, typically include sneezing, nasal itch, rhinorrhea, nasal obstruction, post-nasal drip, and occasionally nasal pain. Based on timing or periodicity of symptoms, allergic rhinitis may be classified as either seasonal or perennial. The prevalence of diagnosed asthma was 5.1% in Russian children and 8.6% in Norwegian children; RR=0.58 (95% CI: 0.44±0.76). The prevalence of all respiratory symptoms was higher in Russian children. The prevalence of allergic rhinoconjunctivitis was 16.9% in Russian children and 22.1% in Norwegian children: RR=0.74 (95% CI: 0.65±0.85). The prevalence of atopic dermatitis was 7.4% in Russian children and 19.7% in Norwegian children; RR=0.38 (95% CI: 0.31±0.46)
Commonly, though not always, many patients with non-allergic rhinitis report that cigarette smoke, hairspray, and perfume trigger symptoms.However, in the end, studies are needed in order to determine whether allergies and/or chronic sinusitis are truly present or not before pursuing further treatment that may be unhelpful.There are other conditions that may produce similar symptoms due to anatomic factors including a deviated septum, large adenoids, turbinate hypertrophy, as well as nasal polyps, but for the sake of the discussion here and to keep things simple, it will be assumed that all anatomic factors are also normal. Many people are affected by allergic rhinitis, making it the sixth most prevalent chronic illness. The peak prevalence of allergic rhinitis is observed in children and young adults. Prevalence estimates range from 10 to 30 percent of adults and up to 40 percent of children, making allergic rhinitis currently the most common chronic condition found in children. Furthermore, in the past 30 years, there has been a dramatic increase in the prevalence of allergic rhinitis in Westernized societies.