I think I have a sinus infection, but it could also be related to necessary dental work to be done. I experience a very bad smell or odor in my nose, particularly when I bend over and stand back up. I also think that I have bacteria in my sinus cavities, causing me to smell this bad odor. Could this be the result of a dental infection? I have a few broken teeth (bicuspids and molars), but my nerves are unaffected. My doctor is treating me with Bactrim and after two days, the bad odor in my nose has not subsided the least bit. Your thoughts, as well as any possible diagnosis condition(s)? Thank you.