I had to abort practice this evening as I suddenly developed a sharp shooting pain in the second knuckle (proximal interphalangeal joint) of my RH middle finger, most notably in when playing a third along with the little finger (finger 5). There has been no warning of this pain building up over time.
Has anyone else experienced this kind of pain when playing? What's the cause?
I'm very worried for the immediate and longer term.
Thank you in advance.