Nasal polyps form as a result of chronic inflammation in the nose and sinuses. These are not cancerous tumors like one might think of in colon cancer; rather, they are outgrowths of mucous. If they grow large enough, they will cause nasal congestion and impair your sense of smell and taste. Like your lawn, polyps can be cut back, but like your lawn, they will also grow back. Medication can slow their growth. Identifying an allergen that is causing their growth and avoiding it can help slow the growth, too. Many patients with nasal polyps will be sensitive to non-steroidal anti-inflammatory medications like aspirin. Desensitizing to aspirin can significantly slow the growth of nasal polyps and reduce the need for surgery.