SOPP552: The little finger on my right hand is giving me problems

This question was sent by Joanna, and she writes: “Dear Vidas, The little finger on my right hand is giving me problems. It has been like this for a few years. I am afraid I will have to give up organ playing in a couple of years’ time because it is stiff, and it clicks and makes a jumping movement at the knuckles. It is a problem to play fast passages because of it. Is there anything I can do… practise more? Practise less? Exercises? Joanna”