Nasal polyps are fleshy growths of the lining of the nose and sinuses. Their roots are found in the upper part of the nose and in the ethmoid and maxillary sinuses. On a sinus x-ray they may look like clouding of the ethmoid and maxillary sinuses. A developing polyp is teardrop-shaped. A mature polyp looks like a peeled seedless grape. They can get large enough to block the opening of the sinuses and the nasal passage. You could certainly be feeling this as intense sinus pressure. Some people have problems with a stuffy nose, sinus infections, or loss of their senses of taste and smell.
Surgery to remove the nasal polyps may be suggested. However, the chance of nasal polyps growing back is extremely high. Routine use of a nasal inhaled steroid, like the Nasacort® (triamcinolone acetonide) that you were given, may shrink nasal polyps. If they are small this may be all the treatment that is needed to relieve your symptoms. If they are large, this treatment may shrink them enough that surgery is more likely to remove the entire root of the polyp so that it doesn’t grow back. Following surgery, indefinite routine use of nasal inhaled steroids may keep nasal polyps from growing back.