DNS in Medical Terms: Deviated Nasal Septum, Symptoms and Treatment

In an ENT or nose report, DNS stands for deviated nasal septum. This means the cartilage-and-bone partition between the nostrils bends to one side. A deviation may narrow the nasal passage, but it does not always cause symptoms or need treatment.

DNS is not a test. It is a clinical finding or diagnosis. “DNS to the right” means the septum bends toward the right; “DNS with spur” means there is also a pointed bony or cartilaginous ridge. The finding matters mainly when it matches symptoms and examination findings.

What is the nasal septum?

The septum separates the two nasal passages. Its front part is mainly cartilage and its deeper part includes bone. A deviation can be present from growth or birth, or it can follow an injury. The direction and shape vary from person to person.

Terms you may see in an ENT report

• DNS to right or left: the septum is displaced toward that side.
• C-shaped or S-shaped DNS: a curved deviation described by its shape.
• DNS with spur: a localized ridge that may narrow the passage or touch the side wall.
• Caudal DNS: deviation near the front of the septum, close to the nostril opening.
• Compensatory turbinate hypertrophy: enlargement of tissue on the wider side, which can make both sides feel blocked.

DNS symptoms

A deviated septum can exist without symptoms. When it is clinically important, symptoms may include:

• persistent nasal blockage, often worse on one side;
• mouth breathing or disturbed sleep;
• nasal dryness, crusting or recurrent nosebleeds;
• reduced airflow during exercise;
• snoring, although DNS is only one of several possible causes;
• symptoms that become more noticeable during a cold or allergy flare.

Alternating mild congestion can also occur because of the normal nasal cycle. Persistent one-sided obstruction needs examination because allergy, turbinate enlargement, polyps, sinus disease and other conditions can produce similar symptoms.

How is DNS diagnosed?

An ENT assessment normally begins with the symptom history and examination inside the nose. Anterior rhinoscopy can show the front part of the septum. Nasal endoscopy may be used when the doctor needs to inspect deeper areas or rule out another cause of obstruction.

A CT scan is not automatically required just because a report mentions DNS. It may be considered when sinus disease, trauma, another structural problem or surgical planning needs additional detail. The scan must be interpreted together with symptoms and examination.

DNS treatment: medicine or septoplasty?

When no treatment may be needed

If the deviation is mild and does not interfere with breathing, sleep or daily activity, observation may be enough. A scan or examination finding alone does not automatically mean surgery is required.

Medical management

Medicines do not straighten the septum. They may help if rhinitis, allergy or temporary swelling is contributing to blockage. Depending on the examination and medical history, a clinician may advise saline care or treatment for associated inflammation. Avoid prolonged self-use of decongestant nasal sprays because they can worsen congestion.

Septoplasty

Septoplasty reshapes or repositions the deviated portions of the septum while preserving nasal support. It may be considered when nasal obstruction remains troublesome, matches the septal deviation and has not improved adequately after appropriate management of reversible swelling. Some patients also need treatment of enlarged turbinates, but that decision depends on the individual examination.

Septoplasty is intended to improve nasal function. It is not the same as rhinoplasty, which changes the external shape of the nose, although the procedures may sometimes be combined for specific reasons.

Septoplasty and SMR

SMR means submucous resection. Both SMR and septoplasty are septal operations, but the exact technique and how much tissue is reshaped or removed depend on the deviation and the surgeon’s plan. A procedure name alone cannot predict the result for an individual patient.

What should you expect if surgery is discussed?

The surgeon should explain the expected benefit, alternatives, anaesthesia plan, follow-up and recovery for your case. Temporary congestion and mild blood-stained discharge can occur after septoplasty. Important risks include bleeding, infection, septal haematoma, septal perforation and persistent obstruction. Recovery and improvement vary, so use the instructions given by your treating surgeon rather than a generic online timeline.

When should you seek medical care?

• Arrange an ENT assessment for persistent one-sided blockage, repeated nosebleeds, reduced smell, sleep disruption or symptoms that interfere with daily activity.
• Seek urgent assessment after a significant nose injury, particularly if the nose becomes newly blocked or swollen.
• Go to the nearest emergency department for uncontrolled heavy bleeding, severe breathing difficulty, eye swelling or vision change, or another life-threatening symptom.

Frequently asked questions

What is the DNS full form in medical terminology?

In ENT and nose-related notes, DNS commonly stands for deviated nasal septum. Abbreviations can have different meanings in other contexts, so interpret it with the specialty and the rest of the report.

What does “DNS to right” mean?

It means the septum bends toward the right nasal passage. The degree of blockage and the patient’s symptoms matter more than the direction alone.

What is a DNS test?

DNS itself is not a test. Diagnosis is based on history and examination, with nasal endoscopy or imaging used selectively when more information is needed.

Does every DNS need surgery?

No. Surgery is generally considered for meaningful, persistent symptoms that fit the structural finding after other contributors to congestion have been assessed.

ENT assessment in Hardoi

If one side of your nose remains blocked or your report mentions DNS, bring the report and a list of current medicines to an ENT consultation. The doctor can check whether the deviation explains your symptoms and discuss observation, medical management or septoplasty without assuming that every DNS needs an operation.

Medical references

• Mayo Clinic: Deviated septum — diagnosis and treatment
• American Academy of Otolaryngology–Head and Neck Surgery: Clinical indicators for septoplasty
• Mayo Clinic: Nasal endoscopy

Patient information only. This page cannot diagnose the cause of nasal blockage or replace examination by a qualified clinician.