Nasal Polyps, also known as Sinus Polyps, are non-cancerous growths in the nose or in the sinuses (the canal behiand your cheekbone). The cause symptoms similar to those of cold and flu; however, the symptoms caused by nasal polyps will never get better. You may therefore have a persistently blocked or stuffy nose, and you may experience mucus running down the back of your throat. In addition, large polyps interfere with breathing and this can cause chronic headaches due to lack of oxygen. You may also find yourself yawning a lot, and experience daytime fatigue, even after a proper night's sleep. You will notice that you don't smell or taste as good as you used to.