Rhinitis is inflammation of the inside of the nose caused by an allergen, such as pollen, dust, mould or flakes of skin from certain animals. Symptoms of allergic rhinitis can include; a runny or blocked nose, sneezing mild irritation or discomfort in and around your nose or reduced sense of smell.
These symptoms usually start soon after being exposed to an allergen. Some people only get allergic rhinitis for a few months at a time because they are sensitive to seasonal allergens, such as tree or grass pollen. Other people get allergic rhinitis all year round. In some cases, it may be necessary to have further tests to check for any complications, such as nasal polyps or sinusitis.
These tests may include; a nasal endoscopy, where a thin tube with a light source and video camera at one end is inserted up the nose to view the internal part of the nose, a nasal inspiratory flow test, where a small device placed over the mouth and nose is used to measure the air flow or a computerised tomography (CT) scan to create detailed images of the inside of the body.