RichThesaurus
rub salt in someone's wounds
vs
rub salt into the wounds
rub salt in someone's wounds
verb
To make a painful situation even worse (even with the best of intentions).
rub salt into the wounds
How often have the words
rub salt in someone's wounds
and
rub salt into the wounds
occurred in a corpus of books?
(source:
Google Ngram Viewer
)