A headline from the Evening Standard:
Quite right. It won't heal the scars. That's because scars don't heal. Wounds heal, and, once they've healed, they leave a scar. Everybody knows this except subeditors.
A more accurate song about scars.
The Guardian has a list of of the most annoying and hackneyed words and phrases in English. You can take a look at it here. The first on the list, chosen by Adam Horowitz, is thinking outside the box. Indeed, he suggests that anybody who uses the phrase should be sealed in a box.