Nasal polyps are associated with irritation and swelling (inflammation) of the lining of your nasal passages and sinuses that lasts more than 12 weeks (chronic sinusitis). However, it's possible to have chronic sinusitis without nasal polyps. Nasal polyps themselves are soft and lack sensation, so if they're small, you may not be aware you have them. Multiple growths or a large polyp may block your nasal passages and sinuses. Common signs and symptoms of chronic sinusitis with nasal polyps include: 
A runny nose
Persistent stuffiness
Postnasal drip
Decreased or absent sense of smell
Loss of sense of taste
Facial pain or headache
Pain in your upper teeth
A sense of pressure over your forehead and face
Snoring
Frequent nosebleeds
