Strum
Active member
I took up the ukulele this past March. My thumb on my fretting hand has developed a callus on the index finger side of the thumb knuckle that can be painful when playing. I've tried placing my thumb flatter against the bottom of the neck, on the soft part of the first joint of my thumb (underside of the thumbnail) but it's not easy playing in that position. Is that callus normal, or should I concentrate on changing the way I position my thumb?