Non-allergic rhinitis involves chronic sneezing or having a congested running nose. Nasal mucosa has rich blood supply and has venous sinusoids which are surrounded by smooth muscle fibers. These smooth muscle fibers act as sphincters and control the filling and emptying of sinusoids. Sympathetic stimulation causes construction of blood vessels and shrinkage of mucosa leading to decongestion of nose. Parasympathetic stimulation causes not only excessive secretion from the nasal gland but also vasodilatation and engorgement, which lead to rhinorrhoea and congestion of nose.The autonomic nervous system, which supplies the nasal mucosa, is under the control of hypothalamus. Therefore, emotions play significant role in non-allergic rhinitis.
A survey was perfomed in a representative sample of the Belgian population (n=4959) with an overall prevalence of self-declared recent rhinitis symptoms of 39.3%. Detailed information on patients having experienced nasal symptoms over the past year was then obtained from a random sample of respondents (n=743). High prevalence of self-declared rhinitis symptoms in the Belgian population was found, rhintis being about three times more prevalent than NINA.About 75% of patients seeking medical help suffer from 'moderate to severe' forms of rhinitis. Non-allergic rhinitis can't be cured. But it can be controlled by: Avoiding rhinitis triggers, Using home remedies such as nasal irrigation, Taking over the counter and prescription medications.