Is it allergic rhinitis or sinusitis?

Abstract

Allergic rhinitis occurs when a person inhales a specific substance to which they are allergic. This substance is called an allergen, and although the allergen may be harmless to others, the immune system in an allergic person will react against it by causing the membrane lining in the nose to become inflamed and swollen, and allergy symptoms such as sneezing and nasal congestion may result. Seasonal allergic rhinitis or hay fever may be triggered by outdoor allergens such as pollens and grasses, particularly during spring and summer. Perennial allergic rhinitis occurs all year round and may be caused by indoor allergens found in the home, such as animal dander or house dust mites.

Sinusitis is an inflammation of the lining inside the sinuses. When the sinuses become blocked, mucus drainage is impeded and the sinus cavities fill with fluid. This encourages the growth of bacteria or viruses, and symptoms such as headache and yellowish nasal secretions may occur. Sinusitis may be acute or chronic. Acute sinusitis is temporary and usually resolves within four weeks with conservative treatment. Chronic sinusitis may last for longer than 12 weeks. Conservative measures may alleviate the symptoms, but a doctor may have to be consulted if this is not helpful. Sinusitis may be a complication of infections such as colds or flu and is a common complication of allergic rhinitis.