Chronic sinusitis | Mate taringa-ihu-korokoro

Also known as chronic rhinosinusitis (CRS)

Chronic sinusitis (mate taringa-ihu-korokoro) is an ongoing inflammatory condition of your nasal passages and sinuses. The symptoms last for 3 months or more.

Key points

  1. Sinusitis occurs when your sinuses cannot drain properly. It causes a heavy, full feeling in your head that can be painful and uncomfortable.
  2. Acute sinusitis normally gets better on its own within 1 to 3 weeks, but when symptoms persist for 3 months or more, it is called chronic sinusitis.
  3. Chronic sinusitis is treated with medications, surgery, non-surgical treatments or a combination of these.
  4. There are things you can do to help prevent you getting chronic sinusitis.

What causes chronic sinusitis?

The sinuses are tiny air spaces in your cheeks and forehead and around your eyes. They are lined with a thin membrane that makes mucus, which drains out through your nose. Sometimes the lining becomes inflamed or infected, making it harder for the mucus to drain properly, and the sinuses become blocked. Chronic sinusitis usually lasts for more than 3 months.

Image: Canva

Things that can increase your risk of getting chronic sinusitis are:

  • asthma and allergies such as hayfever
  • nasal polyps (swellings in the linings of your nose or sinuses)
  • deviated septum (where the wall between your nostrils has been displaced sideways by an injury)
  • smoking including passive smoking
  • ongoing exposure to irritant chemicals or fumes 
  • regular use of some nasal decongestants
  • dental disease
  • medical conditions such as cystic fibrosis.

What are the symptoms of chronic sinusitis?

The main symptoms of chronic sinusitis are usually a blocked nose (nasal obstruction) and reduced sense of smell.

You may also:

  • have a headache that becomes worse when you lean forward
  • have a tender and painful face
  • have a sore throat, nausea or coughing
  • have sore ears or teeth
  • feel generally tired
  • have puffy eyes
  • have bad breath
  • not be able to smell or taste things normally.

Unlike acute sinusitis, chronic sinusitis does not often cause a fever.

How is chronic sinusitis diagnosed?

Your doctor can diagnose chronic sinusitis by reviewing your medical history, completing an examination and conducting some tests such as a CT sinus scan.

How is chronic sinusitis treated?

Often treating the underlying cause will help to improve your symptoms. This may mean treating your asthma, allergies or dental disease, or quitting smoking. If the cause relates to the structure of your nose and nasal passages such as nasal polyps, a deviated septum, narrow nasal passages or tissue thickened by years of infection, then it may involve treating this.

You can try the following things to relieve your symptoms:

  • Saline rinses done every day can keep mucus loose, remove secretions, reduce post-nasal drip and rinse away allergens and irritants. You can make a home-made sinus rinse solution or you can buy a sinus rinse from your pharmacy. Read more about saline nasal sprays, drops and rinses.
  • Steroid nasal sprays can help to reduce inflammation of your sinus linings, reduce mucus production and help shrink any polyps that may be present. They have the advantage of delivering the medicine right where it is needed. Read more about steroid nasal sprays.
  • Pain relief medication such as paracetamol or ibuprofen are not ongoing treatments and should only be used when necessary for the shortest possible time.
  • Antihistamines especially ones that are less likely to make your drowsy (like loratadine) can be helpful in preventing allergy and consequently relieving your sinus symptoms if allergy is the cause. They can dry and thicken secretions and make it hard to drain, so they are not suitable for everyone.
  • Antibiotics may be needed if the inflammation leads to a sinus infection. You may need to take them for several weeks. Your doctor will be the best person to guide you regarding this.

Surgical treatment

If medical treatments do not help, you may be offered endoscopic sinus surgery. There are several options: 

  • Functional endoscopic sinus surgery (FESS). This involves a surgeon inserting an endoscope (long tube) into your nose through which they can see what is blocking drainage of your sinuses and remove any tissue that is causing the blockage. This is often all that is needed to improve sinus drainage and ventilation and help to restore normal function to your sinuses.
  • Nasal surgery. Some people have a deviated septum between the left and right nostrils. This can be caused by an injury or something you are born with. Others have extra large nasal turbinates (nodules). Nasal surgery to correct these problems can be helpful.
  • Balloon catheter dilation of paranasal sinus ostia. This involves a surgeon pushing a small balloon through a flexible tube in your nostril into the blocked sinus. By inflating the balloon, blocked areas are pushed to the sides, the balloon is deflated and removed, leaving a sinus drainage channel that can drain properly again. 

Click anywhere on the image to visit the website, then click play.

This surgical video demonstrates the procedure of endoscopic sinus surgery, carried out by Professor Claire Hopkins of Guy's and St. Thomas' Hospital, London, UK

(The Journal of Laryngology and Otology, UK, 2018)

How can I prevent chronic sinusitis?

If you develop acute sinusitis, you can take steps to help prevent it from becoming chronic, including:

  • using saline rinses
  • drinking plenty of water
  • inhaling steam when you’re in the shower
  • propping your head up with a higher pillow when you’re sleeping
  • blowing your nose gently
  • only taking antihistamines if your sinusitis is caused by allergies
  • only using nasal decongestants for a day or 2 as using them for too long can make the problem worse.

Learn more

Antibiotics for sinusitis Choosing Wisely, NZ, 2014
 NHS Choices, UK
Acute and Chronic Sinusitis – treatments and home remedies WebMD
Sinusitis Choosing Wisely, American Medical Association
Patient education – chronic rhinosinusitis (beyond the basics) UptoDate


  1. Antibiotic guide  choices for common infections BPAC, NZ, 2017
  2. Adult sinusitis  plain language summary American Academy of Otolaryngology, US, 2015

Reviewed by

Dr Andrew Cho works in private practice at Robot Head and Neck Surgery and as an otolaryngologist, and head and neck surgeon at Counties Manukau DHB, Auckland. He has previously worked at Starship Hospital in Auckland and undertook a prestigious American Head and Neck Society Fellowship at the University of California in head and neck oncological surgery and microvascular reconstruction. His area of expertise includes general ENT, paediatric ENT, sinusitis, and head and neck surgery.
Credits: Health Navigator Editorial Team. Reviewed By: Dr Andrew Cho, specialist head and neck surgeon and otolaryngologist Last reviewed: 10 Aug 2018