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Nasal Allergies: Related Problems

Allergies can cause nasal passages to swell. This narrows the air passages. Allergies also cause increased mucus production in the nose. These changes result in nasal allergy symptoms. Common symptoms include itching, sneezing, stuffy nose, and runny nose. Nasal allergies can also cause problems in other parts of the respiratory system. Some of the more common problems are discussed below. If you think you have any of these problems, talk with your healthcare provider about treatment choices.

Outline of man's head and chest with head turned to side showing swollen sinuses, nasal polyps, postnasal drip, and red eye.

Sinus infections

Fluid may be trapped in the sinuses. Bacteria may grow in trapped fluid. This causes sinus infection (sinusitis) and pain. Sometimes the sinus pain can spread to the jaw and be mistaken for dental problems.


Allergens irritate your eyes, including the lining of the conjunctiva. This is a common eye infection, especially among children. It causes eyes to become red, itchy, puffy, and watery. Some forms of conjunctivitis are caused by viruses and are highly contagious. These viruses can spread quickly, especially in schools. But conjunctivitis caused by allergens isn't contagious.

Ear problems

The eustachian tube connects the middle ear to nasal passages. Allergies can block this tube, and make the ears feel plugged. Fluid may also build up, leading to an ear infection (otitis media).

Nasal polyps

Allergies cause nasal passages to swell. Constant swelling can lead to formation of a sac that comes from the sinuses called a polyp. Polyps can grow large enough to block nasal passages. Nasal polyps (unlike other polyps) don't cause cancer. But they can cause mild pain and a decreased sense of smell and taste.


Asthma is inflammation and swelling of the air passages in the lungs. The symptoms are wheezing, shortness of breath, coughing, and chest tightness. Allergies, including nasal allergies, are common in people with asthma.

Online Medical Reviewer: Deborah Pedersen MD
Online Medical Reviewer: Jessica Gotwals
Online Medical Reviewer: Marianne Fraser MSN RN
Date Last Reviewed: 10/1/2021
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