Deviated Septum and Snoring: Symptoms and Treatment Options

A deviated septum is one of the most common, and most overlooked, reasons why someone snores through their nose rather than their mouth. Understanding it can help you find the right fix instead of trying products that were never going to work.

What is a deviated septum?

The septum is the wall of cartilage and bone that divides your nose into two nostrils. In an ideal world, it would run perfectly straight down the middle. In reality, most people's septums lean slightly one way or another, and this is entirely normal.

A deviated septum is a more pronounced curve or shift, one that noticeably narrows one or both airways. It can be present from birth, develop as your face grows during childhood, or result from an injury to the nose, even one that happened years ago and seemed minor at the time.

Why a deviated septum causes snoring

Snoring happens when air struggles to flow smoothly through your airway, causing the soft tissues to vibrate. A deviated septum narrows the nasal passage on one or both sides, which forces air through a tighter gap. This increases turbulence and airflow resistance right at the entrance to your airway.

There's a knock-on effect, too. When breathing through the nose feels restricted, many people shift to mouth breathing during sleep. This bypasses the natural humidifying and filtering the nose provides, and it also makes the soft palate and throat tissues more likely to vibrate. If you'd like the fuller picture of how different structures contribute to snoring, our guide on why you snore, and what your snoring means is a useful starting point.

Symptoms that point to a deviated septum

Not everyone with a deviated septum snores, and not everyone who snores has a deviated septum. That said, certain patterns are worth noting.

• Snoring that seems worse when you sleep on one particular side
• One nostril feeling more blocked than the other, often switching sides over time
• Noisy or laboured breathing through the nose, even when you're not unwell
• Frequent nasal congestion without an obvious cold or allergy
• Nosebleeds that happen more often than seems usual
• A sense of facial pressure or sinus discomfort
• Waking with a dry mouth, which suggests you've been breathing through it overnight

These symptoms tend to build gradually, so many people simply adjust to breathing this way without realising it isn't normal.

When to see a GP

Most snoring linked to a deviated septum is a nuisance rather than a danger. However, you should book an appointment with your GP if you notice any of the following:

• Loud snoring accompanied by gasping or choking sounds
• Witnessed pauses in breathing during sleep
• Persistent daytime exhaustion, even after a full night in bed
• Snoring that has suddenly worsened or changed in character

These can be signs of obstructive sleep apnoea, a condition that needs proper assessment rather than self-treatment.

Getting a proper diagnosis

If you suspect a deviated septum, the sensible first step is a GP appointment. They can examine your nose, ask about your history of injuries or childhood nasal problems, and assess whether the deviation is likely to be contributing to your snoring.

In some cases, you'll be referred to an ear, nose and throat (ENT) specialist for a closer look, sometimes using a small camera called an endoscope to see further into the nasal passages. This helps rule out other causes of nasal obstruction, such as enlarged turbinates or nasal polyps, which can produce similar symptoms and sometimes coexist with a deviated septum.

Treatment options, from conservative to surgical

Non-surgical approaches

For mild deviations, several simple measures can genuinely help before anything more involved is considered:

• Nasal strips or external dilators: these lift the sides of the nose to widen the nostrils, which can ease airflow on the less obstructed side.
• Internal nasal dilators: small devices worn inside the nostrils to hold the airway open more effectively. Our review of the best nasal dilators for snoring compares the options if this is a route you'd like to try.
• Saline nasal sprays or rinses: these can reduce congestion and swelling, particularly if allergies are adding to the problem.
• Sleeping on your back or the less blocked side: a small positional change sometimes makes a meaningful difference.
• Treating underlying allergies: if hay fever or dust sensitivity is inflaming your nasal lining, addressing that separately can ease overall airflow.

These measures won't straighten the septum itself, but they can reduce the impact it has on your breathing and snoring.

Septoplasty: the surgical option

When symptoms are more significant, or conservative measures haven't helped enough, an ENT surgeon may discuss septoplasty. This is a procedure to straighten the septum, usually carried out under general anaesthetic, with recovery typically involving some nasal congestion and mild discomfort for a week or two.

Septoplasty isn't automatically offered for snoring alone. It tends to be considered when nasal obstruction is clearly affecting breathing, sleep quality or daily life, and where a specialist has confirmed the septum is a meaningful contributing factor. It's worth having a frank conversation with your ENT team about realistic expectations, since straightening the septum improves nasal airflow but won't necessarily eliminate snoring if other factors, such as throat tissue or tongue position, are also involved.

If snoring has progressed to suspected sleep apnoea, surgery is assessed differently, and our guide to sleep apnoea surgery options explains when procedures are considered and what they typically involve.

A sensible way forward

If you think a deviated septum might be behind your snoring, start by noticing the pattern: which side is worse, whether it's linked to allergies or old injuries, and whether anyone has noticed pauses in your breathing. Try simple measures first, and see your GP if symptoms are persistent or if any red-flag signs appear. For a broader look at snoring causes and solutions, our snoring hub is a good place to explore next.