I have hyper mobility in my fingers... so bad that I had to stop playing the
violin in middle school, because it was causing issues. I would say I forgot my violin at home, because I didn't want to deal with my fingers acting up when playing...
I am not sure if they are a specialist, they are in the same facility as my neurologist, I see him through Dr. Bath Green at the University of Miami. When I was referred, my referral letter says "EDS" on it.