i have had 5 sinus surgeries due to blocked nasal passages and improper drainage. On the last 2, I had so many polyps, or as the ent said, "gobs and gobs of them". In the last 5 years (i am 39 now), I have developed multiple allergies and a problem with the polyps.
I was told singulair works great for people who have them recurring, and that it was used to prevent them. Of course with other steroid nose sprays and treatment for your allergies. But once you have them, surgery is the only way to remove them and unblock your passages.
I must say I trust my ent completely. She is best thing that has happened to me to help with my chronic sinus trouble/allergies.
Kaymac