I know, I know, no one should be diagnosing themselves. But hear me out 
For many years I have had very occasional shooting pains in my right arm from elbow to wrist. Happens occasionally, maybe a couple of times in quick succession, then nothing for weeks or months. Very quick, but very painful and for a fraction of a second I can't grip etc.
Recently it's becoming much more common and for the past couple of weeks it's happening daily, maybe a couple of dozen times a day.
I had never given it any thought, just thought it was 'one of those things' when suddenly I realised that several of my close family have had to have surgery for carpal tunnel syndrome and I started to think 'I wonder...'
I haven't got to talk to the family members yet so I thought I'd ask random strangers instead.