Blocked nose — causes of chronic breathing problems
A chronically blocked nose is not harmless. Difficulty breathing over the long term means worse sleep, reduced concentration, more frequent sinus infections — and importantly, it can signal a structural problem (deviated septum, polyps) that requires surgical correction.
What “blocked nose” means
In medical terms, nasal obstruction is the sense of impaired airflow through one or both nostrils. We distinguish acute obstruction (a few days, related to a cold or allergy) and chronic obstruction (lasting more than 3 months, with various possible causes).
Most common causes of chronic nasal obstruction
Deviated nasal septum
The most common anatomic cause. The septum between the nostrils may be deviated from birth or after trauma. It is identified on a routine ENT exam and corrected with septoplasty — surgery that straightens the deviation and restores airflow.
Turbinate hypertrophy
The turbinates (inferior nasal conchae) humidify and warm inhaled air. They can enlarge due to chronic inflammation, allergy, or decongestant overuse. Treatment is turbinate reduction — a minimally invasive procedure.
Nasal polyps
Soft tissue outgrowths from the sinus mucosa that extend into the nasal cavity. They accompany chronic rhinosinusitis and allergy. They can be small or completely block the airway. Treatment is a combination of topical corticosteroids and FESS surgery (functional endoscopic sinus surgery).
Chronic rhinosinusitis
Inflammation of the sinus mucosa lasting more than 12 weeks. Characterized by nasal congestion, discharge (often postnasal), facial pain, and reduced sense of smell. Often requires FESS surgery when conservative therapy fails.
Allergic rhinitis
The most common cause in younger patients. Sneezing, nasal itching, watery discharge, congestion — often seasonal. Treatment is antihistamines, topical corticosteroids, allergy testing, and, if needed, immunotherapy.
Other causes
- Nasal tumors — rare but serious; detected by endoscopic exam
- Foreign bodies in children — often cause unilateral congestion and purulent discharge
- Adenoids in children — covered in a separate article on pediatric nasal obstruction
- Decongestant overuse / “rebound” (rhinitis medicamentosa) — from prolonged use of decongestant nasal sprays
⚠️ When to definitely see a doctor
- Unilateral obstruction lasting more than 4 weeks (may indicate a tumor or foreign body)
- Obstruction with unexplained nosebleeds
- Facial pain with high fever (acute sinusitis)
- Persistent loss of sense of smell
- Obstruction that disrupts your sleep or daily activities
Diagnostics
Our approach to a blocked nose isn’t guessing — we use:
- Endoscopic nasal exam — a flexible endoscope shows us exactly where the obstruction is, whether there are polyps, deviation, adenoids, or another pathology
- Allergy testing — without identifying the exact allergens, treating allergic rhinitis is just “trial and error”
- CT of the paranasal sinuses (as needed) — a complete map of anatomy and pathology
Treatment — from conservative to surgical
Conservative therapy (first line)
Topical corticosteroids, antihistamines for allergy, saline or hypertonic nasal rinses, targeted antibiotics only when there’s a clear bacterial indication. Most patients respond to this approach alone.
FESS — endoscopic sinus surgery
For chronic sinusitis with or without polyposis, FESS is the gold standard. Minimally invasive (no external incisions), short recovery, and long-lasting airway patency.
Septoplasty
Surgical correction of a significantly deviated septum. Same-day procedure, 7–10 day recovery, lasting solution.
Turbinate reduction
Turbinate reduction or partial turbinectomy — reducing the size of enlarged turbinates. The lightest of the three procedures, with quick recovery.
💡 What you can do at home
- Regular nasal rinses with saline or hypertonic solution
- Humidified air in the bedroom, especially during the heating season
- Avoid prolonged use of decongestant sprays (more than 5–7 days can worsen the problem)
- If you suspect allergy — keep a diary of when symptoms worsen (season, food, household allergens)
Related topics
👃 Nose & sinuses (hub)
😴 Snoring & sleep apnea
👶 Pediatric ENT
🔍 All symptoms
A chronically blocked nose doesn’t have to be your normal
An endoscopic nasal exam precisely identifies the cause. In most cases, a solution is available — either conservative or through a minimally invasive procedure.