Hello. I had total bilateral ethmoidectomy, total bilateral spenoidectomy, removal of polyps and a steroidal stent implanted on August 1, 2014. This was my third sinus surgery. The other s were primarily polyp removal. This was the most radical. About 7 days ago, I started noticing a foul odor in my nasal cavities. I ve had my first post op follow op. My ENT said he saw some infection but he didn t prescribe antiobiotics. is the odor related to the infection? Should I be on an oral antibiotic. I was on mupirocin about 2 months ago for MRSA in my nose.