twist the knife

Etymology
Derived from the fact that the act of literally twisting a knife that is still inside someone who has just been stabbed will widen the wound and make it even more painful.

Verb

 * 1)  To deliberately do or say something to worsen a difficult situation or increase a person's distress, irritation, or anger.

Translations

 * Finnish: vääntää veistä haavassa
 * French:
 * Italian: girare il coltello nella piaga
 * Polish:, pogarszyć
 * Spanish: hacer sangre