I had my 3rd finger cut off and reattached in 1985. For 20 It hurt so bad when using med. strings. I learned to compensate with my pinky. In 2005 I started using super lites, and was slowly able to begin using my 3rd finger again. I worked my way back up to med. this yr. Maybe switch to light gauge strings for awhile and maybe you can develop more control w a liter gauge.