Non-allergic rhinitis

Non-allergic rhinitis is an inflammation of the nasal mucosa, and the dilation of the blood vessels leading to a physical congestion. It may also be caused by the receptors in the nasal mucosa not properly detecting the airflow, thereby causing the nervous system to perceive the presence of a blockage in the airway.
Non-allergic rhinitis can be sporadic or perennial, and can be triggered by many different things. The reasons for why you may start to suffer from NAR can vary, but commonly include exposure to environmental irritants such as odors or polluted air, certain medications, changes in the weather and certain foods.

The functioning of the nasal mucosa is regulated via the autonomic nervous system

The nasal mucosa is a complex structure that has multiple functions. The pathogenesis of nasal congestion is equally complex and involves a number of interacting processes, not least neural reflexes which play an important role in the pathogenesis.

Nasal congestion has many names and causes

A wide array of agents may initiate nasal congestion. These agents include allergens, such as pollen, house dust, dust mites, viruses and bacteria (common cold and rhino-sinusitis) , hormones (due to pregnancy) and medications (e.g. nasal sprays). There is often an overlap as well as a combination of causes leading to the condition. When no initiating agent can be identified the terms idiopathic and non-allergic rhinitis are often used.
Taken together the complexity of causes and possible agents offers considerable diagnostic and therapeutic challenges.
Non-allergic rhinitis (NAR) is often a diagnosis of exclusion in the absence of evidence of an allergic etiology. The relative prevalence of NAR as compared to allergic rhinitis (AR) often increases with age.
Are you suffering from NAR, you can present with the full constellation of rhinitis symptoms, including nasal congestion and rhinorrhea.

Nasal congestion has many names and causes

Nasal congestion has many names and causes which often overlap. Diagnosis of the exact underlying cause is a significant challenge. Typically, the diagnosis is based on symptoms. Neurogenic inflammation plays an important underlying role in the pathogenesis of mucosal congestion.