Nasal congestion is often attributed to a temporary common cold. However, unilateral nasal congestion, especially if it persists on the same side for weeks, requires a detailed evaluation of the anatomical structures and mucosa inside the nose. Insufficient airflow through the right or left nostril may significantly affect sleep quality, exercise capacity, sense of smell, and daytime energy.
Not every unilateral obstruction means a serious disease. Common and treatable causes such as septal deviation are quite frequent. Nevertheless, it is not possible to understand the true source of the problem only by looking at how the complaint is described. The correct approach is to evaluate the inside of the nose with endoscopic examination and, when necessary, clarify the cause with imaging methods.
Why does unilateral nasal congestion develop?
Although the nose consists of two separate airways, the bone and cartilage partition between them – the septum – is not always completely straight. Deviation of the septum to one side may narrow the airflow on that side. This condition, called septal deviation, may be congenital, become more noticeable during development, or occur after blows to the nose. If the congestion is persistent and especially if one specific side feels predominantly blocked, deviation is one of the commonly encountered causes.
However, enlargement of the turbinates, commonly known as nasal tissues, may also narrow the airway. Allergic rhinitis, chronic irritation, infections, or certain environmental factors may cause the turbinates to swell. This swelling may be bilateral, or it may be felt more noticeably on the narrower side in people with septal deviation. Increased congestion while lying down at night or blockage of the lower side when lying on one side may suggest turbinate enlargement together with the nasal cycle.
Chronic inflammatory diseases of the sinuses and inside of the nose may also cause unilateral complaints. In chronic sinusitis, facial pressure, postnasal drip, reduced sense of smell, or recurrent infections may accompany the obstruction. Although nasal polyps are generally bilateral, they may initially be more prominent on one side. In unilateral polyp-like formations, the appearance and origin should be carefully examined.
In children and young adults, foreign bodies that have entered the nose may also cause unilateral obstruction and foul-smelling discharge. In adults, previous nasal surgery, adhesions, valve narrowing, or airflow disturbance around a septal perforation may cause similar complaints. Especially in obstruction that begins or worsens after rhinoplasty, not only the septum but also the narrowest airway region called the nasal valve should be examined.
Which symptoms should not delay an ENT examination?
Unilateral obstruction may sometimes be accompanied by nosebleeds, crusting, foul-smelling discharge, facial numbness, or pain. These symptoms do not always indicate a serious cause; however, they require detailed evaluation. Especially if there is unilateral and recurrent bleeding, progressively increasing obstruction, unexplained facial pain, a neck mass, changes related to vision, or unintentional weight loss, an ear, nose and throat specialist should be consulted without delay.
Tumors of the nose and sinuses are rare. However, in unilateral, progressive nasal complaints that do not respond to standard treatments, it is medically important to exclude this possibility. The aim is not to create anxiety, but to follow a safe path with appropriate examination in every patient.
If the complaint lasts longer than a few days, recurs frequently, or impairs quality of life, evaluation may be planned. Long-term self-use of decongestant nasal sprays is not a correct solution. Although these sprays may provide short-term relief, especially when used for more than five to seven days, they may lead to a more resistant condition called rebound congestion.
What is evaluated during examination?
ENT evaluation begins by understanding how long the patient has experienced the obstruction, under which conditions it increases, and the accompanying findings. Previous trauma, previous surgeries, allergies, snoring, changes in sleep quality, and medications used are diagnostically valuable. The external structure of the nose is also examined because deviation of the nasal bridge or weakness of the nasal wings may directly affect the airway.
Then an intranasal examination is performed. Endoscopic examination helps evaluate septal deviation, the condition of the turbinates, polyps, inflammatory discharge, adhesions, and posterior nasal areas that cannot be seen directly. When necessary, computed tomography provides detailed information, especially regarding sinus disease and surgical planning. If suspicious tissue is detected, the physician appropriately plans further examinations such as imaging or biopsy.
At this stage, it is important to know that not every deviation seen on imaging requires surgery. Some people may have significant deviation but still breathe adequately; in others, a more limited-looking narrowing may combine with a nasal valve problem and cause severe breathing difficulty. The treatment decision is made by evaluating the anatomical finding together with its impact on the patient’s daily life.
Treatment is planned according to the cause
If allergy or mucosal swelling is the main issue, nasal cleansing with saline, corticosteroid-containing nasal sprays considered appropriate by the physician, and allergy treatment may be beneficial. The effects of these treatments often become noticeable after regular use. Rather than expecting sudden and permanent relief, time should be allowed for the mucosa to heal.
If septal deviation mechanically narrows the airway, septoplasty may be considered. The aim of this surgery is not to change the external appearance of the nose, but to improve airflow by correcting the deviated septum. If turbinate enlargement accompanies the condition, reduction procedures involving the turbinates may also be added to the plan in suitable patients.
In cases of external nasal deviation, nasal valve narrowing, or structural problems that develop after previous rhinoplasty, intervening only on the septum may not be sufficient. Functional rhinoplasty or revision rhinoplasty may require repair of the cartilage structures that support breathing. Here, aesthetic goals and respiratory function should be considered together. Safely widening the airway while preserving the natural appearance of the nose requires individualized surgical planning.
When chronic sinusitis, polyps, or another formation inside the nose is detected, the treatment approach changes. Endoscopic sinus surgery may be considered in selected patients when medical treatment is insufficient. If a unilateral mass is suspected, the priority is to correctly determine the nature of the formation and plan treatment accordingly.
Why may breathing not feel the same immediately after surgery?
After nasal surgeries, a feeling of congestion may be expected during the first days due to swelling, crusting, and the healing process. The patient’s preoperative sensation of airflow and early postoperative experience may not be the same. Regular follow-up visits, intranasal cleaning, and care practices recommended by the physician play a role in healthy healing.
Especially in people who have previously undergone surgery, tissue structure, cartilage support, and existing scar tissue make planning more sensitive. Therefore, in revision cases, detailed examination, previous operation information when necessary, and establishing realistic expectations are of great value.
Rather than considering unilateral obstruction only as a temporary discomfort, this signal from the body should be evaluated correctly. Once the cause is clarified, options ranging from medical treatment to functional nasal surgery can be safely planned according to the individual’s anatomy and daily-life needs.
