den Finger in die Wunde legen

Etymology
lit. 'to put one's finger in the wound'.

Verb

 * 1) to rub salt in the wound, to twist the knife, to touch a sore spot
 * 2) to bring up a sensitive but important issue, to address a negative state of affairs, to criticize and analyze
 * 1) to bring up a sensitive but important issue, to address a negative state of affairs, to criticize and analyze
 * 1) to bring up a sensitive but important issue, to address a negative state of affairs, to criticize and analyze