“Doctor, I can’t remember the last time I breathed properly through my nose.” That sentence opens many consultations at the office. People who live with nasal obstruction know the routine: sleeping with the mouth open and waking up with a dry throat, depending on a decongestant spray, feeling that one side of the nose never opens. And, perhaps most frustrating of all, hearing for years that “it’s just rhinitis.”
A nose that is blocked every day is not normal, and it has a cause. When the cause is identified, there is almost always a path of treatment. On this page, we explain how we investigate nasal obstruction and what the options are, from clinical measures to surgery.
What is nasal obstruction?
Nasal obstruction is the feeling that air does not flow freely through the nose, on one side, on both, or alternating. The nose is not a simple pipe: it filters, humidifies, and warms the air on its way to the lungs. When it is blocked, the body falls back on mouth breathing, which is an emergency route. That is where the dry mouth, the snoring, and the poor-quality sleep come from.
Why does the nose get blocked? The most common causes
Nasal obstruction almost never has a single cause. At the office, we actively look for each of these possibilities, because they tend to add up:
- A deviated nasal septum. The septum is the wall that divides the nose into two corridors. When it is crooked, one of the corridors (sometimes both) is permanently narrow. It is a structural cause: it does not improve with medication.
- Turbinate hypertrophy, almost always associated with rhinitis. The turbinates are the spongy structures inside the nose. In poorly controlled allergic rhinitis, they stay swollen and take up the space meant for air. It is the cause that responds best to clinical treatment, and the one that most often leads to dependence on decongestant sprays.
- Nasal polyps. Benign growths of the mucosa that develop inside the nose and the paranasal sinuses, often with loss of smell.
- Chronic sinusitis (chronic rhinosinusitis, CRS). Persistent inflammation of the sinuses, with obstruction, discharge, and facial pressure that drag on for months. We explain this condition on the chronic sinusitis page.
- In children, the adenoids. Tissue behind the nose that, when enlarged, makes the child breathe through the mouth, snore, and sleep poorly. It is a condition of childhood, which we detail on the adenoid hypertrophy in children page.
The same patient can have a deviated septum and rhinitis at the same time. That is why operating without investigating can end in that classic complaint: “I had surgery and my nose is still blocked.”
How we find the cause: consultation and nasal endoscopy
The investigation starts with a conversation: when the nose gets blocked, on which side, what makes it better, which medications have already been tried, how sleep is going. Then come the physical examination and nasal endoscopy, a quick and generally well-tolerated exam, performed right at the office with a thin micro-camera that shows, in real time, the septum, the turbinates, the adenoid region, and the drainage openings of the sinuses.
With that picture, in most cases we can answer the question that matters: what, in your nose, is blocking the air? When necessary, we complement the assessment with a CT scan or allergy testing.
If your nose is always blocked and you have never been through this investigation, that is the first step. Book a Consultation
The treatment ladder: clinical care first, surgery when indicated
There is no single treatment for nasal obstruction; there is the right treatment for each cause. We follow the logic of a ladder: we start on the clinical step and only recommend surgery when it truly is the answer to the problem we found.
Clinical treatment
For rhinitis and for a good share of sinusitis cases, treatment starts with medication (usually intranasal corticosteroid sprays, nasal rinsing with saline, and allergy control). Done correctly and consistently, it shrinks the turbinates and gives the nose its space back. It is also the test that separates what is inflammation, which responds to medication, from what is structure, which does not.
One important point: decongestant spray (a vasoconstrictor) is not treatment. It relieves on the spot, but daily use perpetuates the obstruction and creates dependence. Breaking that cycle, with medical follow-up, is part of the plan.
Septoplasty, when the problem is the septum
If the endoscopy shows a significant deviation and symptoms persist despite clinical treatment, the correction is surgical: septoplasty, which straightens the internal wall of the nose. It is functional surgery, aimed at breathing, not aesthetics.
Laser turbinoplasty, when the turbinates do not respond to medication
When the turbinates remain enlarged even with the rhinitis treated, we can reduce them. Laser turbinoplasty reduces the volume of the turbinates while preserving their role of filtering and humidifying the air. It is frequently performed together with septoplasty, in the same surgical plan.
Functional endoscopic sinus surgery (FESS)
When the cause lies in the sinuses, with chronic rhinosinusitis that does not respond to clinical treatment or with polyps, the option is functional endoscopic sinus surgery (FESS), performed through the nose, with no external cuts, to clear the drainage pathways.
In children, assessment of the adenoids
In a child who breathes through the mouth, snores, and sleeps poorly, the investigation and the treatment criteria are specific, including the decision between monitoring and operating. That path is described on the adenoids in children page.
On every step, the same rule applies: the indication comes from the examination, not from a catalog. Results vary from case to case, and the decision is always built together with the patient.
The nose and sleep: a connection that often goes unnoticed
A good share of patients who complain of snoring, poor sleep, or difficulty adapting to CPAP (continuous positive airway pressure, the device used for sleep apnea) have an obstructed nose at the root of the problem. Treating nasal obstruction may improve the snoring itself and allow sleep treatments to work as they should. If, besides the blocked nose, you snore or wake up tired, bring that complaint to the same consultation.
Frequently asked questions
Is it harmful to use decongestant spray every day?
Daily, prolonged use of a vasoconstrictor tends to cause a rebound effect: the nose blocks up faster and faster and becomes dependent on the spray, a condition called rhinitis medicamentosa. The way out is not willpower; it is treating the cause of the obstruction with medical follow-up.
I had septum surgery and my nose is still blocked. Is that normal?
It happens, and it usually indicates that the deviation was not the only cause: enlarged turbinates, uncontrolled rhinitis, or sinusitis can keep the obstruction going even with the septum corrected. It is worth reinvestigating with nasal endoscopy.
My nose is blocked on one side only. What could it be?
The most common cause is a deviated septum. But persistent obstruction on one side only can also indicate a polyp or other localized changes, which is why it deserves an endoscopic examination.
Can nasal obstruction be cured?
It depends on the cause. When there is a clear structural factor, such as a deviated septum, surgical correction can resolve the complaint. When the basis is inflammatory, as in rhinitis, the realistic goal is ongoing control. Be wary of promises of a single fix: a serious answer starts with the investigation.
Does a child who breathes through the mouth need adenoid surgery?
Not always. There are criteria for deciding between monitoring, treating clinically, and operating, which depend on the intensity of the symptoms, on sleep, and on exams such as endoscopy. That decision is individualized and explained to the parents during the consultation.
If breathing through your nose has become the exception in your routine, the first step is to find the cause. At Dr. José Eduardo Marcondes’s practice, the investigation includes nasal endoscopy during the consultation itself, and the treatment plan, from clinical care to surgery, is built together with the patient. Care is private (out-of-pocket), at the Morumbi, Itaim Bibi, and Alphaville locations. Book a Consultation
Dr. José Eduardo Marcondes, otolaryngologist (ENT physician). CRM-SP 107.711 (Brazilian medical license) | RQE 43.840 (specialist registration). This content does not replace a medical consultation.