Nearly every disagreeable smell a human body can produce can be blamed on bacteria
, from bad breath
to foot odor. In your case, the foul taste in your mouth may be a sign of a new infection.
Make an appointment to see your dentist, so they can rule out anything serious such as an abscess
. In the meantime, try washing
your mouth with an anti-septic mouthwash
(there are many on the market).
Answer assisted by Cole Livingston, Medical Student