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CAUSE OF ALLERGIES: |
| Allergic reactions to dust, molds, pollens, animal dander and other allergens present in the environment are widespread, tending to gradually become chronic. The nasal congestion blocks drainage from the sinus cavities, leading to acute and chronic sinusitis. Chronic allergies are associated with bronchial asthma in up to 33% of patients. This is a serious medical condition that can be fatal in some cases. |