Non-allergic rhinitis
Non-allergic rhinitis Causes Non-allergic rhinitis occurs when the lining of the inside of the nose becomes swollen and inflamed, usually because of swollen blood vessels and fluid building up in the tissues of the nose. This swelling blocks the nasal passages and stimulates the mucus glands in the nose, resulting in the typical symptoms of a blocked or runny nose. Some of the main causes of non-allergic rhinitis are described below. Infection In many cases, rhinitis develops as the result of an infection attacking the lining of the nose and throat. This is usually a viral infection, such as a cold, but bacterial or fungal infections can occasionally cause rhinitis. Environmental triggers In some people, rhinitis appears to develop as a result of environmental triggers, such as: smoke perfume paint fumes changes in the weather, such as a drop in temperature alcohol ...
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