The cramps and soreness are like tj said from muscle fatigue. Sometimes after a good night the ends of my fingers are like they are on fire. Nerve problems are a little different, you'd feel a tingling sort of like when they go to sleep. I have had a compressed ulnar nerve since last feb, still waiting on the specialist appt. It had left my little finger and half of the ring finger without any feeling. It was scary but after going to a chiropractor and acupuncturist for the last three months a lot of my feeling has come back. Somedays better than others but playing has not made it any worse, actually sometimes it feels better after a good workout. If it's your fingers are sore and kind of burny then maybe your pushing them down too hard or a lot of big bends. Anyway hope you get a handle on it and get back into the swing of things... Good Luck
