Why does hay fever cause nasal congestion?
Hay fever causes nasal congestion because the body's immune system reacts to allergens, such as pollen, by releasing chemicals like histamine. This reaction leads to inflammation in the nasal passages, causing them to swell and produce excess mucus. As a result, the airflow through the nose becomes blocked, leading to a feeling of congestion.
Key points:
- Allergens trigger an immune response in the body.
- Histamine release causes inflammation in the nasal passages.
- Swelling and excess mucus production block airflow.
- Nasal congestion is a common symptom of this reaction.
This text has been fact-checked for accuracy by medino's clinical team.