Why does hay fever cause a runny nose but also congestion?
Hay fever causes a runny nose and congestion due to the body's reaction to allergens like pollen. When exposed to these allergens, the immune system releases chemicals that increase mucus production, leading to a runny nose. At the same time, the swelling of nasal tissues can block airflow, resulting in congestion.
Key points:
- Allergens trigger an immune response in the body.
- Increased mucus production leads to a runny nose.
- Swelling of nasal tissues causes blockage and congestion.
- Both symptoms arise from the same allergic reaction.
This text has been fact-checked for accuracy by medino's clinical team.