sore/numbish finger pad in Ergonomics Posted July 7, 2012 How bad is the soreness/numbishness? If it's so bad that it's painful for you to play (or use the finger for anything else), that may be a sign of a bad playing habit. Are you trying to use your index finger to help support the weight of the concertina? (If you are, you might need to adjust your handstraps or something.) Or, if you feel you're pushing the button harder than necessary, you're probably right, and you should try to overcome that. For example, when I first started playing, I had to really work to overcome my intuitive feeling (left over from my piano playing days, I guess) that pushing a button harder would make the note sound louder. Obviously, it doesn't work like that on a concertina, but my fingers didn't know it yet. On the other hand, if your finger just feels a little tingly, and you've been practicing for hours and hours, it's probably nothing to worry about. It's normal for your fingers to rebel against being used in ways that they're not accustomed to. Maybe slow down your practice schedule just a little for the time being - and pity the poor beginning guitar players, who have it much worse.