Vasomotor rhinitis develops when blood vessels swell inside the nose, causing a build-up of excess fluid, often caused by infections such as a cold or influenza. Other factors such as extreme weather or humidity can also trigger the condition. Irritants such as smoke, fumes, or smog can trigger some affected individuals. Nonallergic rhinitis can also develop as the result of hormonal changes in the body. For this reason, many people develop this type of rhinitis during puberty, pregnancy, or menopause.
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