An intranasal polyp is a swollen mass of tumor that develops from nostrils to be sinusitis. Several polyps can appear at the same time and obstruct the nostrils. Nasal polyps develop widely in humans with chronic sinusitis infections.
Small polyps can generally be treated by nasal sprayers containing corticosteroids. If polyps do not respond to nasal spray treatment, they may require surgery. However, even successful polyps often reproduce.