It's a bit difficult judge the condition of yours without a physical examination, but anyway, there could be several reasons for that including: 1) poorly positioned wisdom tooth which accumulate bacteria and food. 2) there is a soft tissue that cover your wisdom tooth partially in a condition called pericoronitis. read more
3) wisdom tooth may not be the responsible but there is an overal oral hygiene lack which result in food and bacteria accumulation and thus bad odor and taste. in first two situations you need to pull your wisdom tooth by your dentist. read more
Apart of the bad taste in mouth, several people additionally complaint about the bad breath issue they are having after lift their tooth or wisdom tooth. read more