When my nephew Chaim was three-years old, he used to have nose bleeds quite often - so often, that he had a procedure done in the doctor's office to stop the constant nosebleeds. It worked, but he walked around the house saying, "Something hurts and I don't know! Something hurts and I don't know!" My brother Sol said at that moment, "Chaim your nose hurts! - Oh yes, my nose hurts!" Now that he was aware of what was bothering him, he felt so much better.