Looks like inflammatory condition- something like Rheumatoid arthritis
Contact a doctor to get some basic blood tests like ESR,CRP,RA factor, Total and differential WBC count
and an X ray.
Anti-inflammatory like paracetamol
and Brufen should help.
Another possibility in someone who uses vibratory instruments for a long time is CRPS(Chronic regional pain syndrome
) type II. Examination by a doctor will help whether this is the case. However, going by your symptoms looks a bit unlikely.