Hi. I'm new here and Wilks introduce myself shortly in a different forum. But I am having a problem! I currently play with a funk band in Korea and when I play songs like sex machine or express yourself which have big octaves, especially sex machine because I play it eb octave twice then ab Bb db bd db I get a tight pain between ny thumb and index finger on that side of my hand. This is obviously a technique problem. Is there anything I can do or another way to play the tune to alleviate this pain. Honestly sometimes I can't even finish the tune. I've also for blisters on me ring fingers. I'm probably playing too hard, but I'm trying to get a dirty funk pop with the fingers while I work on my slap. Thanks and happy playing.