Parosmia

[Sarah]

changes to the sense of smell that make things smell different from usual, and usually unpleasant :

[Tracie Lynn]

Abnormality in the sense of smell.

[Dave Paprocki]

Parosmia is a term used to describe health conditions that distort your sense of smell. Parosmia is sometimes confused with another condition called phantosmia, which causes you to detect a “phantom” scent when theres no scent present.