Nasal polyps are polypoidal masses arising mainly from the mucous membranes of the nose and paranasal sinuses. They are overgrowths of the mucosa that frequently accompany allergic rhinitis. They are freely moveable and non-tender. Nasal polyps are usually classified into antrochoanal polyps and ethmoidal polyps. Antrochoanal polyps arise from the maxillary sinuses and are much less common, ethmoidal polyps arise from the ethmoidal sinuses. Antrochoanal polyps are usually single and unilateral whereas ethmoidal polyps are multiple and bilateral

The polyps are generally soft and pearl colored, with a consistency like jelly. Very small single or multiple polyps may not cause any problems, but larger ones are likely to obstruct the airways in your nose, making it difficult to breathe. This may lead to mouth breathing, especially in children.

Other signs and symptoms of nasal polyps include:

• A runny nose
• Persistent stuffiness
• Chronic sinus infections
• Loss or diminishment of your sense of smell
• Dull headaches
• Snoring