Some patients with symptoms of rhinitis do not have an allergy.
What is non-allergic rhinitis?
Non-allergic rhinitis is inflammation of the inside of the nose that isn't caused by an allergy. Rhinitis caused by an allergen, such as pollen, is a separate condition known as allergic rhinitis.
Symptoms of non-allergic rhinitis can include:
- a blocked nose
- a runny nose – this may be through the nostrils or down the back of the nose (catarrh)
- sneezing – although this is generally less severe than in allergic rhinitis
- mild irritation or discomfort in and around your nose
- reduced sense of smell
These symptoms can be constant or they may come and go.
While these symptoms are similar to those of allergic rhinitis (hay fever), non allergic rhinitis is different because, unlike an allergy, it doesn't involve the immune system.
What causes non-allergic rhinitis?
There are many different causes and often it is not possible to identify one cause.
There are several factors that can be associated with non-allergic rhinitis:
- Infection
- Irritants e.g. smoke, paint fumes
- Change in temperature
- Alcohol
- Spicy food
- Stress
Some medications:
- Some blood pressure tablets (eg. those ending with a ‘pril’ such as Ramipril)
- Aspirin, Ibuprofen and other common painkillers
- Cocaine use
- Some medication available for treating blocked nose (eg. Otrivine)
- Hormonal changes e.g. pregnancy, puberty and HRT
Overuse of drugs for ‘blocked nose’
Some sprays (such as Otrivine) unblock your nose by reducing the swelling of the blood vessels in your nose. However, if they are used for longer than five to seven days at a time, they can cause the lining of your nose to swell up again. This can happen even after the original problem has resolved. If you use more decongestants in an attempt to reduce the swelling, it is likely to make the problem worse. The medical term for rhinitis caused by the overuse of nasal decongestants is rhinitis medicamentosa.
Tissue damage
Inside your nose, there are three ridges of bone covered by a layer of tissue. These layers of tissue are called turbinates. A type of rhinitis called atrophic rhinitis can occur if the turbinates become damaged.
Most cases of atrophic rhinitis in the UK occur when the turbinates are damaged or removed during surgery (sometimes it is necessary to surgically remove turbinates if they're obstructing your airflow).
Turbinates play an important role in the functioning of your nose, such as keeping the inside of your nose moist and protecting the body from being infected with bacteria. If they are damaged or removed, the remaining tissue can become inflamed, crusty, and prone to infection.
What investigations do I need?
Sometimes the symptoms will be enough to make the diagnosis clear and no tests will be required. However it is quite common to have some allergy tests to exclude this common cause of rhinitis. Rarely blood tests may be carried out.
How can I use my medication most effectively?
All rhinitis medication should be taken regularly to gain the maximum benefit. It is more difficult to treat symptoms that are already well established.
Nasal washes - Washing the nose with a saline wash can relieve symptoms and clean the nose prior to using a nasal spray.
The solution can simply be sniffed up the nose, or if preferred proprietary devices are available e.g. Sinus RinseTM.
Ingredients for saline wash solution:
- 240 mls previously boiled and cooled water
- 1/4 teaspoon salt
- 1/4 teaspoon bicarbonate of soda
Antihistamines - Surprisingly antihistamines can sometimes be helpful.
Antihistamine nasal sprays can be obtained over-the-counter from your pharmacy or on prescription.
Anticholinergic nasal spray - These are helpful for people with primarily a runny nose.
Steroid nasal spray - This is the most effective treatment for rhinitis. Nasal sprays are available over the counter (e.g. Fluticasone ) or on prescription. There are several types of nasal spray so you may need to try more than one to find one that works best for you.
Taking nasal sprays
- Shake bottle well
- Look down
- Using RIGHT hand for LEFT nostril put nozzle just inside nose and aim towards outside wall
- Squirt once or twice (2 different directions)
- Change hands and repeat for the other side
- DO NOT SNIFF HARD
Decongestants – Some cases of non-allergic rhinitis are caused by overusing nasal decongestant sprays. In these cases, the best treatment is to stop using these sprays. However, this can be difficult, particularly if you've been using them for some time.
Try not using the spray in your least congested nostril first. After seven days this nostril should open up, at which point you should try to stop using the spray in your other nostril.