Any condition that contributes to chronic inflammation in your nasal passages or sinuses ( chronic sinusitis ) such as infections or allergies , may increase your risk of nasal polyps. Conditions and factors often associated with nasal polyps include ..

• Asthma sufferers –  a disease that causes inflammation and contraction of airways
• Anyone with an Aspirin sensitivity  or any allergy like response to aspirin and other  NSAID ‘s ( non-steroidal anti-inflammatory drugs  ) such as Brufen and Naproxen run a higher risk of developing nasal polyps.
• Allergic fungal sinusitis sufferers – an allergy to airborne fungi
• Cystic Fibrosis sufferers  – a chronic genetic disorder that results in the production and secretion of abnormal fluids including thick mucus from nasal and sinus membranes.
• Chung-Strauss syndrome sufferers – an uncommon disease that causes the inflammation of blood vessels
• Rhinitis sufferers – inflammation and irritation of the mucous membrane inside of the nasal cavity.
• Individuals genetic makeup and family history – usually if your parents suffer from nasal polyps or if they have had nasal polyps, then you run a higher risk of developing them yourself.
• Age and sex – Adult males over the age of 40 are the highest risk of any demographic.