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Rhinitis: Nose
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Rhinitis or sinusitis is an inflammation of the mucosa (lining) of the nasal cavity or sinuses. There are many causes of rhinitis that affect dogs of all breeds and ages. Young dogs are more prone to the infectious causes and older dogs tend to develop tumor or dental disease related rhinitis. Long nosed dogs seem to be more prone to the fungal and cancerous causes of rhinitis.
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Rhinitis is an irritation and inflammation of the nose. Rhinitis is caused by airborne irritants, virus, or bacteria which trigger the release of histamine. Histamine opens the blood vessels, causes swollen membranes, and produce excessive fluids. Rhinitis is often associated with the common cold, or flu.
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Rhinitis medicamentosa occurs when non-prescription topical decongestants—over-the-counter nose sprays—are used in excess, often for more than three consecutive days. This form of rhinitis causes severe nasal congestion and is best treated by stopping use of the offending nasal spray. This often leads to temporary severe congestion, which can be helped by topical or oral corticosteroids.
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Rhinitis causes symptoms such as runny nose, itching, and sneezing that may be uncomfortable for the child. Nonallergic rhinitis is not thought to have any significant long-term consequences. Children who have allergic rhinitis may be at increased risk for developing asthma.
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Rhinitis is commonly caused by a viral infection or allergy. Older people... may develop rhinitis in response to aging itself (atrophic rhinitis), irritants and cold temperatures (vasomotor rhinitis), certain foods (gustatory rhinitis), certain drugs (drug-induced rhinitis), low levels of thyroid hormone (hypothyroidism), or fleshy outgrowths in the nose (nasal polyps).
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Rhinitis is an inflammation of the nasal mucosa (the mucous membrane that lines the nose and the sinus ), often due to an allergic reaction to pollen , dust or other airborne substances ( allergens ). Although the pathophysiology of many types of rhinitis is unknown, an accurate diagnosis is necessary, since not all types of rhinitis will respond to the same treatment measures. A heterogeneous disorder.
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