What brand hand paddles are they? I am an avid hand paddler, and I have dealt with finger soreness. One or two things will happen you will either get used to it or not. If you don't you have some options. One thing you should focus on is not putting all the pressure on your finger tips. Focus the power on your thumb, and where you palm meets your fingers. Also you can glue foam to the hand paddles just underneath you knuckles where your fingers, and palm meets. Use your pinky, and thumb to do pry strokes, and keep the power in your palm. I don't use foam, but I have went back, and forth on the idea. Let me know if that helps. I make hand paddles, and I have been wanting to put together some instructional hand paddling videos together for this reason, but I have been having supplier issues which puts a damper on things.