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Nasal Polyps Learning Center
Causes could include:
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Nasal polyps typically start near the ethmoid sinuses (located at the top of the inside of the nose) and grow into the open areas. Large polyps can block the sinuses or nasal airway.
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Some people who are allergic to aspirin develop both asthma and nasal polyps. Nasal polyps often plug the nose, usually one side at a time. People with allergic rhinitis are so used to having a stopped up nose they may not notice the difference wh...
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