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Causes
Doctors don’t know the cause of nasal polyps. Several factors may contribute to nasal polyps, including:
- Irritation in the sinuses from allergy or infection
- Frequent sinus infections
- Asthma
- Allergy to things in the air
Risk Factors
A risk factor is something that increases your chance of getting a disease or condition. The following factors increase your chance of getting nasal polyps:
- Sex: men
- Age: older than 40
- Aspirin sensitivity
- Asthma
- Churg-Strauss syndrome (a rare disease that inflames the blood vessels)
- Cystic fibrosis
- Hay fever or other respiratory allergies
- Frequent sinus infections