Nasal Obstruction – Causes, Diagnosis and Treatment
There are several important causes of chronic nasal obstruction. Structural factors include a deviated nasal septum, enlargement of the inferior turbinates, or anatomical variations such as concha bullosa, an air‑filled expansion of the middle turbinate that can narrow the nasal airway. Inflammatory conditions such as allergic rhinitis, chronic rhinosinusitis, and nasal polyps may further contribute to mucosal swelling and impaired airflow.
Coronal CT scan view of deviated nasal septum to the left (red arrow) and right Concha bullosa (blue arrow). Right inferior turbinate (yellow arrow)
A frequently overlooked cause of persistent nasal blockage is dependence on topical nasal decongestant sprays such as oxymetazoline or xylometazoline (commonly known by brand names such as Otrivin® or Afrin®). While these sprays provide rapid short‑term relief, prolonged use can lead to rebound congestion, a condition known as rhinitis medicamentosa. Patients may become increasingly reliant on these medications, resulting in worsening nasal obstruction and chronic mucosal swelling.
Persistent nasal blockage can significantly affect quality of life. Poor nasal breathing may lead to disturbed sleep, daytime fatigue, headaches, reduced concentration, and impaired sense of smell. In some individuals, long‑standing obstruction may also increase the risk of recurrent sinus infections or worsen snoring and sleep‑related breathing disorders.
Accurate diagnosis is essential to identify the underlying cause. In addition to nasal endoscopy and clinical examination, objective functional testing such as rhinomanometry can be performed to measure nasal airflow and resistance. This helps quantify the severity of obstruction and supports personalised treatment planning.
Treatment depends on the cause and severity of symptoms. Medical management may include intranasal corticosteroid sprays, antihistamines, saline irrigation, and structured withdrawal from decongestant sprays where dependence has developed. When structural narrowing significantly impacts breathing or sleep quality, surgical procedures such as septoplasty, turbinate reduction, or endoscopic sinus surgery may be recommended to restore a clear and stable nasal airway.
Early specialist assessment allows targeted therapy aimed at improving nasal breathing, enhancing sleep quality, and supporting long‑term sinus health.
