Odd cuts/injuries in parts of your body that made you aware

Of how often you do things

Like a cut on weird part of your finger and you feel it every time you put your hands in your pockets.

Or, a few months ago I reached to close my car door. Tendons or ligaments or something in my left ring finger got strained. All the way up to the elbow. It hurt for a few weeks and I had no idea how often I sued that finger to do things (like opening the car window).