A deviated septum is a shift of the wall inside your nose away from the center, making one nasal passage smaller than the other. It’s extremely common. Roughly 80 percent of people have a septum that’s at least slightly off-center, though only about 5 percent ever need medical attention for it.
What the Septum Actually Is
The nasal septum is the thin wall that runs down the middle of your nose, dividing it into two passages. It’s not a single piece of material. The front portion is flexible cartilage, while the back is made of bone. Together, these components act as the nose’s main structural support, holding its shape and directing airflow evenly through both sides.
When the septum sits roughly along the midline, air flows equally through both passages. A deviated septum means part of that wall is pushed to one side, narrowing one passage and widening the other. Deviations vary by location and severity. A mild bend near the back of the nose may cause no issues at all, while a sharp curve near the front can significantly block airflow.
What Causes It
There are two main paths to a deviated septum: you’re born with one, or something shifts it later. Some babies are born with a deviation, possibly from pressure during development or delivery. More often, a deviation develops from an injury to the nose, whether that’s a sports collision, a fall, or any direct hit to the face. In many cases, people don’t remember a specific injury. The septum can shift gradually during normal growth through childhood and adolescence, so a mild deviation present at birth can become more noticeable over time.
Symptoms You Might Notice
Most people with a deviated septum have no symptoms. The deviation simply isn’t severe enough to cause trouble. When it does cause problems, the most common complaint is difficulty breathing through one or both nostrils. You might notice this more at night, when lying down naturally increases nasal congestion.
Other signs include:
- Frequent nosebleeds. A deviation can expose the septum’s surface to more direct airflow, drying out the tissue and making it crack and bleed.
- Noisy breathing during sleep. Narrowed passages force air through a tighter space, which can produce audible breathing or snoring.
- Sleeping only on one side. If one passage is significantly narrower, you may instinctively favor the side that keeps your more open nostril down, improving airflow while you sleep.
- Recurring sinus infections. A deviation can block the drainage pathways of the sinuses, trapping mucus and creating a breeding ground for infection.
A cold or allergies can make these symptoms temporarily worse. Swelling in the nasal lining takes up space that’s already limited, turning a mild obstruction into a noticeable one.
Deviated Septum vs. Swollen Turbinates
Not all nasal congestion comes from a crooked septum. Inside each nasal passage, small bony ridges called turbinates are covered in tissue that warms and moistens the air you breathe. These turbinates can become permanently enlarged, a condition called turbinate hypertrophy, and the symptoms feel almost identical: chronic stuffiness, mouth breathing, and snoring. The two conditions often coexist. When the septum pushes into one side, the turbinate on the opposite side frequently enlarges to fill the extra space. This means fixing only one problem sometimes leaves the other untreated, which is why both are evaluated together.
How It’s Diagnosed
Diagnosis is straightforward. A provider looks inside your nose using a bright light and a tool that gently spreads the nostrils open. For deviations deeper in the nose, a thin, flexible scope with a light on the tip gives a clearer view. No imaging is usually needed. The exam takes just a few minutes, and the deviation is typically easy to see.
Managing Symptoms Without Surgery
Medications can’t straighten a deviated septum, but they can reduce the swelling in the surrounding tissue that makes a deviation feel worse. Steroid nasal sprays shrink inflamed tissue, opening up airflow. Decongestant sprays do the same thing more quickly but can cause rebound congestion if used for more than a few days. Saline rinses help keep the nasal lining moist, which reduces nosebleeds and clears out mucus. For people with mild symptoms, these approaches are often enough to keep things manageable without any procedure.
When Surgery Makes Sense
If medications aren’t providing relief and breathing difficulty is affecting your sleep, exercise, or daily comfort, the standard surgical fix is a procedure called septoplasty. The surgeon works entirely through the nostrils, repositioning or removing the bent portions of cartilage and bone to straighten the septum. There are no external incisions and no change to the outer shape of your nose.
Initial recovery takes about one to two weeks. Most people return to light activities like walking and household chores within a week. Strenuous exercise, including workouts and contact sports, typically needs to wait about a month. Swelling inside the nose is normal during this period and gradually subsides. Full healing of the bone and cartilage continues for several months, so the final result isn’t immediate.
What Happens if You Leave It Untreated
A mild deviation that isn’t causing symptoms doesn’t need treatment, and leaving it alone carries no risk. A severe deviation is a different situation. Chronic obstruction over years can lead to persistent sinus infections, dry mouth from habitual mouth breathing, and in some cases, sleep apnea, where breathing repeatedly stops and starts during sleep. Children with significant deviations may also experience recurring ear infections, since nasal obstruction can affect the drainage pathway between the nose and ears. None of these outcomes are guaranteed, but they’re worth knowing about if you’ve been putting up with symptoms for a long time.