when i rub this very specific area of my gums, in the extreme back where the wisdom teeth are, i get a foul smell. No other area produces that smell. I have rubbed everywhere. I have had some work done (root canal) and have deep cavities in that same area that produces the smell. I have gum disease but under control, I see my dentist every three months for maintenance for last three years, and everything has been going great. He has recommended removing wisdom teeth...gums don't bleed, or hurt, or swell since i began treating my gum condition. What can be the cause of smell and how can i treat it before seeing my dentist for next appointment?