Thanks Michael.Michael.N. wrote:I've suffered that kind of weakness many times. At one time I couldn't even hold a simple D chord, even though I had been playing for years.
You need to stop what you are doing. My guess is that you are self studying, which means you are in a bit of a bubble, lacking expert feedback. It doesn't get better by itself, believe me. In fact it could get much worse and lead to permanent damage. Rest. Go see a doctor. The doctor can only treat the symptoms though. They can't tell you how to hold and play the guitar. Go see someone who knows about classical guitar technique and who is very familiar with whole body posture. They will almost certainly tell you what you are doing wrong within a few minutes. That's because what you are suffering from isn't entirely uncommon, they have probably seen the same many times.
You can also go see an Alexander specialist - although I personally have no experience with Alexander. A good idea is to get in touch with your nearest music college/conservatoire. These days I think they all have an Alexander practitioner and most will also do private work. The advantage with Alexander teachers that work in music colleges is that they have probably seen hundreds of students on violins, pianos, guitars - you name it. Even if they don't play the instrument themselves they are certain to have experience with guitar students. Just pick a college that teaches classical guitar.