I managed just over 8000 hrs in 35 years and have mild carpal tunnel in both wrists and moderate nerve compression in my elbows. Just before leaving the RAF the physios attributed both symptoms to my long career in rotary. I believe a study was carried out on US Army pilots and found these conditions common on high hour pilots.When the nerve compression flares up I get a stabbing pain between my shoulder blades but you just get used to it after a while.