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.