You know how horrible 2-part epoxy smells? She can't smell it an inch from her nose. I mean zero sense of smell.
The more so because the condition is quite often coincident with a tremendous state of denial. Anosognosia:
https://en,wikipedia.org/wiki/Anosognosia
https://opinionator.blogs.nytimes.com/2010/06/20/the-anosogn... (part 1 of a 5-part series)