question: Hi, I bent my left hand middle finger back last Tuesday. not excessively. I heard a pop in my wrist. hurt a bit. Thought I would shake it off. Wednesday though I lost all feelings in my thumb of my left hand. A feeling similar to when you go to the dentist and have an injection prior to a filling. It s not all my thumb just the left side. It s not got any worse nor better. Any idea what I have done. Thanks