I too had a bottom left molar extracted about 6 weeks ago. The tooth
was originally a root canal gone bad. I started having this awful smell radiating from my mouth & nose about 2 months b4 I had the extraction
done (this is what lead me to the defaulted root canal in the 1st place). After having the tooth
pulled, the smell & the slight pain I had had went away. Then 3 days later, the smell came right back, as if it had never left.