Pour salt on the wound
Meaning
Make someone feel worse after they are already hurt.
Usage
Used when additional pain is inflicted.
Origin & History
Origins and dates here are approximate summaries. Many idioms have disputed or unknown origins, and not every date has been checked against a historical dictionary, so treat specific dates and stories as a starting point rather than a citation.
Salt irritates open wounds, creating more discomfort.
Used metaphorically since at least the 19th century.