You need to see a neurologist...Am 65 and have had both hands "de-carpled"...Do exercises...And still play everything from an upright to a mandolin...Sometimes I need some stretching, etc...But...The hands still eventually come around...My first guitar teacher recently died @ 94...&...Six months before his death when he shook your hand, he'd just about drive you to your knees...And...He was always big on stretching & exercising...Tennis ball kinda stuff, etc...