Nonallergic rhinitis
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Nonallergic rhinitis involves chronic sneezing or a congested, drippy nose with no apparent cause. The symptoms of nonallergic rhinitis are similar to those of hay fever (allergic rhinitis), but none of the usual evidence of an allergic reaction is present.
Nonallergic rhinitis can affect children and adults, but is more common after age 20. Triggers of nonallergic rhinitis symptoms vary and can include certain odors or irritants in the air, changes in the weather, some medications, certain foods, and chronic health conditions.
A diagnosis of nonallergic rhinitis is made after an allergic cause is ruled out. This may require allergy skin or blood tests.
If you have nonallergic rhinitis, you probably have symptoms that come and go year-round. You may have constant symptoms, or symptoms that last only a short time. Signs and symptoms of nonallergic rhinitis may include:
Nonallergic rhinitis doesn’t usually cause itchy nose, eyes or throat — symptoms associated with allergies such as hay fever.
See your doctor if:
The exact cause of nonallergic rhinitis is unknown.
But, experts do know that nonallergic rhinitis occurs when blood vessels in your nose expand (dilate), filling the nasal lining with blood and fluid. There are several possible causes of this abnormal expansion of the blood vessels or inflammation in the nose. One possibility is that the nerve endings in the nose may be hyperresponsive, in a manner similar to the way the lungs react in asthma.
But whatever the trigger, the result is the same — swollen nasal membranes and congestion.
There are a number of things known to trigger nonallergic rhinitis — some resulting in short-lived symptoms while others cause chronic problems. Nonallergic rhinitis triggers include:
Certain medications. Some medications can cause nonallergic rhinitis. These include aspirin, ibuprofen (Advil, Motrin IB, others), and high blood pressure (hypertension) medications, such as beta blockers.
Nonallergic rhinitis can also be triggered in some people by sedatives, antidepressants, oral contraceptives or drugs used to treat erectile dysfunction. Overuse of decongestant nasal sprays can cause a type of nonallergic rhinitis called rhinitis medicamentosa.
Factors that may increase your risk of nonallergic rhinitis include:
Complications from nonallergic rhinitis include:
There’s currently no surefire way to prevent nonallergic rhinitis. However, a new study suggested that children who ate oily fish or certain polyunsaturated fatty acids may be less likely to develop nonallergic and allergic rhinitis. The reduced risk was seen in children who consumed herring, mackerel or salmon at least once a week.
If you already have nonallergic rhinitis, you can take steps to reduce your symptoms and prevent flare-ups:
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Nonallergic rhinitis
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