Allergy, Nose & Sinus

Deviated nasal septum – What you need to know

February 3, 2020
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What is a deviated nasal septum (DNS)?


A nasal septum is a thin bony-cartilaginous wall that separates the nasal cavity into a right side and a left side (Figures 1a-b). A deviated nasal septum is a condition in which the nasal septum is crooked, bent or shifted to one side of the nasal cavity (Figure 2). A significant deviated nasal septum may result in one nasal passage being smaller.



Deviated Septum Illustration

Figure 1a – Location of the nasal septum in the nose



Cartilaginous Parts

Figure 1b – The side view of a nasal septum showing the bony and cartilaginous parts.



Septum Illustration

Figure 2 – A comparison between a normal septum and a deviated nasal septum (in this case deviated to the patient’s right)



What causes a deviated nasal septum?


A deviated nasal septum may be due to:


  1. A condition that is present at birth
  2. An injury to the nose – e.g. trauma to the nose from fights, sporting injuries or road traffic accidents



What are the symptoms of a deviated nasal septum?


Majority of the time, a mildly deviated nasal septum does not cause any symptoms and can be left alone. However, depending on the severity of a deviated nasal septum, it can cause the following symptoms:


  1. Blocked nose (on one or both sides of the nose)
  2. Frequent nosebleeds (epistaxis)
  3. Recurring sinus infections (recurrent sinusitis)



How is a deviated nasal septum treated?


There is no medication that can treat a deviated nasal septum. It is a structural problem and can only be corrected by surgery. The surgery to correct a deviated nasal septum is called Septoplasty.



When do I need a Septoplasty?


Septoplasty is recommended if you have:


  1. Significant symptoms from a deviated nasal septum
  2. A deviated nasal septum that is preventing access to the nose or sinus during surgery (e.g. during sinus surgery or during surgery to stop a bleeding vessel behind a deviated nasal septum)



What does Septoplasty involves?


Septoplasty is a surgical procedure to straighten a deviated (crooked or bent) nasal septum. The procedure is performed under general anaesthesia (with the patient completely asleep). The operation is performed through the nose with no external cuts or wounds on the face. Some surgeons may perform the surgery with the aid of an endoscope. During a typical septoplasty, a surgical cut (incision) is made on the one side of the nasal septum inside the nose (Fig 3b). The lining of the nasal septum (mucoperichondrium) is carefully lifted (Fig 3c & 3d). Underlying bone and cartilage that is crooked is removed or shifted. It is important to understand that some portions of the nasal cartilage and bone may not be removed because they are important in maintaining the structure of the external nose.


Once the desired straightening of the nasal septum is achieved, the incision is sutured with an absorbable material that will dissolve on its own with time (Fig 3e). To keep the shifted septum in place and to prevent the accumulation of blood underneath the mucosa, plastic splints may be inserted (Fig 3f). These splints are usually removed a week later in the clinic. Quite often, a septoplasty is performed together with an inferior turbinate reduction procedure .



Deviated cartilage & dore mound

Figures 3a-f – How a Septoplasty is performed



What are the possible risks and complications from Septoplasty?


Septoplasty is, in general, a safe surgical procedure. However, as with all surgical procedures, there are some risks involved. The most common risk is bleeding (<5%). Rare complications of Septoplasty include infection, perforation of the septum, altered shape of the nose and a decreased sense of smell.


Mild remnant deviation of the nose may occur after Septoplasty as structural portions of the septal cartilage or bone may have been preserved during the operation. To minimize risks of bleeding and infection, it is important for patients to keep their nose clean by frequent nasal irrigation.



What is the recovery after Septoplasty?


The surgery can be done as a Day Surgery Procedure (patient goes home on the same day) or as an Inpatient Procedure where the patient is warded overnight. If the surgery is performed together with an inferior turbinate reduction procedure, nasal packings may be inserted. The nasal packings are usually removed 1 – 2 days after surgery. Patients will be given oral antibiotics, pain relievers and a nasal wash (douche).


The patient is usually reviewed in the clinic 5 – 10 days after surgery. During this time, the ENT surgeon will remove the nasal splints and clean the nasal cavity with a nasal suction. The subsequent clinic reviews depend on how well the septum is healing. Although the wound heals rapidly and most patients can return to normal activities of daily living after one week, the overall healing process of the septum can take up to six months to a year. The septum may take some time to settle into its final shape and form. The improvement in breathing should be noticeable after the first clinic visit (once the splints are out and the nose has been cleaned by your surgeon). The patient should expect further improvement in breathing with time as the septum heals.



Are there any food restrictions after Septoplasty?


Although there is no evidence that any particular food will worsen your recovery or outcome of your surgery, it is advisable to avoid very hot and spicy food and to avoid excessive alcohol intake in the 1st week after surgery. The increased blood flow associated with facial flushing may theoretically increase the risk of bleeding from the incompletely-healed tissues of the nose.



When can I resume heavy physical activity?


As the healing process varies from person to person, it is generally advised that patients should avoid any heavy physical activity (e.g. weight lifting, intense aerobic exercises) for at least 2 weeks after the surgery.



Best wishes,


Dr Gan Eng Cern
ENT Specialist Singapore

    When Should You See an ENT Specialist in Singapore?

    • Any ear, nose or throat symptoms that you are troubled with or concerned about
    • Persistent blocked nose with mouth breathing or snoring

    Dr Gan Eng Cern

    Dr Gan Eng Cern is a distinguished ENT doctor with fellowship training. In addition to his clinical practice as an ear, nose and throat specialist in Singapore, Dr. Gan has contributed to the academic field as a Senior Clinical Lecturer at the Yong Loo Lin School of Medicine, National University of Singapore. He is recognised for his extensive research work, with numerous contributions to reputable international ENT journals. Dr Gan is also highly sought after as a speaker and has shared his surgical knowledge as a surgical dissection teacher at various prominent ENT conferences and courses.


    • 2020 – Reader’s Choice Gold Award for Best ENT Specialist (Expat Living Singapore)
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    • 2014 – 19th Yahya Cohen Memorial Lectureship (awarded by the College of Surgeons, Academy of Medicine Singapore for best scientific surgical paper)
    • 2012 – Human Manpower Development Award (Ministry of Health, Singapore)
    • 2007 – Singhealth Best Doctor Award


    • MBBS – Bachelor of Science, Bachelor of Medicine, Bachelor of Surgery (University of New South Wales, Sydney, Australia)
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    • MMed (ORL) – Master of Medicine in ENT (National University of Singapore)
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