Don't pick it

I was staying with Auntie Beryl and Uncle Alan many years ago and we were walking past a man digging a hole in the path with a pickaxe, and Alan said to him "It'll never get well if you pick it!" I think the same thing applies in this modern world. If it itches - scratch it, but if it doesn't, leave it alone. I don't wish to know that - please leave the stage! Boom! Boom!