Turbinate Hypertrophy (Enlarged Turbinates)

What the turbinates do

Each side of the nose has three turbinates, called inferior, middle and superior. They are covered in a lining rich in blood vessels that can swell and shrink within minutes. This lets them warm, humidify and filter air before it reaches the lungs.

Normally, the turbinates on one side swell while the other side shrinks, then they switch every few hours. This is the nasal cycle, and most people do not notice it. With turbinate hypertrophy, swelling is excessive or permanent, so the cycle becomes noticeable and both sides may be blocked.

The inferior turbinates are the largest and most often cause blockage. Enlargement can involve the soft lining (mucosal hypertrophy), the bone inside (bony hypertrophy), or both.

Symptoms

• a stuffy or blocked nose that does not go away (nasal congestion)
• blockage that alternates sides or is worse on the side you lie on
• breathing through the mouth, especially at night
• snoring and disturbed sleep
• dry mouth and throat in the morning
• postnasal drip and a runny nose
• reduced sense of smell
• a feeling of pressure across the nose and cheeks

Causes

Inflammation of the nasal lining

• Allergic rhinitis: reactions to pollen, dust mites, pets or mold. The most common cause.
• Non-allergic rhinitis: triggered by smoke, perfume, temperature changes, alcohol or spicy food.
• Rhinitis medicamentosa: rebound swelling from using decongestant sprays such as oxymetazoline for more than a few days.
• Chronic sinusitis.

Hormones and medicines

• pregnancy (pregnancy rhinitis)
• hypothyroidism
• some blood pressure medicines, erectile dysfunction medicines and birth control pills

Structural causes

• Deviated septum: when the dividing wall bends to one side, the turbinate on the wider side often enlarges to fill the space (compensatory hypertrophy).
• Bony enlargement that is present from development.

Environmental factors

Dry air, smoking, secondhand smoke and air pollution keep the lining irritated.

Turbinate hypertrophy vs deviated septum

Both cause a blocked nose, and they often occur together.

Diagnosis

An ear, nose and throat (ENT) doctor or primary care doctor will:

• look inside the nose with a light and a small speculum
• spray a decongestant and look again. Turbinates that shrink well have mostly soft-tissue swelling, which responds to medical treatment. Turbinates that barely shrink suggest bony enlargement
• perform nasal endoscopy with a thin camera to look for polyps, septal deviation and sinus disease
• order allergy testing if allergy is suspected
• order a CT scan only if sinus disease or surgery is being considered

Treatment

Medical treatment

Most people start here, and many need nothing more:

• Steroid nasal sprays (fluticasone, mometasone, budesonide, triamcinolone): reduce lining swelling over 1 to 2 weeks. Use daily, aiming the nozzle slightly outward, away from the septum.
• Antihistamine nasal sprays such as azelastine, alone or combined with a steroid.
• Saline sprays or rinses to clear mucus and irritants.
• Avoiding allergy triggers and, for persistent allergies, allergen immunotherapy (shots or tablets).
• Ipratropium nasal spray if a watery runny nose is a main problem.
• Stopping decongestant sprays if overused. Switching to a steroid spray and stopping one side at a time can make withdrawal easier.

Oral decongestants are not a long-term solution and can raise blood pressure.

Turbinate reduction surgery

If symptoms persist after 1 to 3 months of consistent medical treatment, turbinate reduction is an option. The aim is to shrink the turbinate while preserving its lining and function.

• Radiofrequency reduction: a probe heats the tissue inside the turbinate, causing it to shrink over several weeks. Often done in the office under local anesthetic.
• Submucosal reduction with a microdebrider: removes tissue beneath the lining.
• Outfracture: the turbinate bone is gently pushed toward the side wall.
• Partial turbinectomy: removing part of the bone and tissue, used for larger or bony turbinates.

Turbinate reduction is often combined with septoplasty when both problems are present. Recovery usually involves a few days to a week of congestion, crusting and mild discomfort. Saline rinses speed healing.

Risks include bleeding, crusting, dryness and, rarely, regrowth needing repeat treatment. Removing too much turbinate tissue can cause empty nose syndrome, a paradoxical feeling of blockage despite a wide airway. Modern techniques that preserve tissue make this uncommon.

Outlook

Most people improve with medical treatment, especially when allergies are controlled. Turbinate reduction improves nasal breathing in most people who need it. Because ongoing inflammation can cause regrowth, continuing allergy treatment after surgery helps maintain results.

Frequently asked questions

What causes enlarged turbinates?

The most common cause is ongoing inflammation of the nasal lining from allergies or non-allergic rhinitis. Overuse of decongestant sprays, pregnancy and other hormonal changes, smoke and dry air also contribute. A deviated septum can cause the turbinate on the opposite side to enlarge.

Can swollen turbinates go back to normal?

Yes, often. Swelling of the soft lining usually improves with steroid nasal sprays, saline rinses, allergy control and stopping decongestant spray overuse. Bony enlargement does not shrink with medicine and may need a turbinate reduction procedure if it causes persistent blockage.

Is turbinate reduction surgery worth it?

For people with persistent blockage despite 1 to 3 months of proper medical treatment, turbinate reduction usually improves nasal breathing and sleep. It is a short procedure with quick recovery. Results last for years in most people, though continued allergy treatment helps prevent regrowth.

Why is my nose blocked on one side and then the other?

This is the nasal cycle, a normal alternating swelling of the turbinates every few hours. Most people do not notice it. When the turbinates are enlarged from allergies or rhinitis, the swelling becomes noticeable, so the blockage seems to switch sides, especially when lying down.

Can turbinate hypertrophy cause sleep problems?

Yes. A blocked nose forces mouth breathing, which increases snoring, dry mouth and broken sleep, and can worsen sleep apnea. Treating nasal obstruction often improves sleep quality and can make CPAP more comfortable for people who use it.