G'day, everyone. I was wondering if anyone could comment or give suggestions to relieve (or correct) the pain in my left middle finger when I play my guitars. I first experienced this when I tried playing Cavatina on my new, highly rated, thin-necked Yamaha CG 171S (bought last week of March). The pain feels as if the nerve is being stretched or stressed and is quite pronounced when I do barres up the neck (last 4 frets). I've never experienced this before with my other guitars, one of which has a thick and long neck (664mm), but now I feel a bit of pain as well when I play them. (When I bought the Yamaha, was under the impression that a thin-necked guitar would be more COMFORTABLE to play than a regular guitar.) I have since stopped playing the Yamaha for pieces requring complex barres. Any advice will be most appreciated. Best regards.