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Hello, everyone, is not really a question but more a explanation to get advice. So what’s happening is, my left thumb is not okay, I play with no shoulder rest, I feel much more freely without it. This problem is more in 1st - 3rd position, for example I play in 1st position in strings A and E, there I don’t have much problem, where it starts getting big is when I play in the G and D strings, i don’t carry the violin with the thumb, no tension in shoulder or chin, is free, but when playing in the lower strings, my thumb feels like it’s sliding very slowly up the neck, thumb either slides up or bends inward to left, when thumb is bend inward my hand i simply can’t play well, specially vibrato. I need help!😂😂🤷🏻♂️👉👉👍 thank you!
It's hard to tell from your description, but it sounds like you may need to swing your elbow to the right so that your fingers can reach over the fingerboard more easily.
I also wonder if the violin feels insecure on your shoulder when you are on the low strings; that would explain the instinctive motion to try and grip the neck. The thumb does need to support some of the weight of the violin when you are playing without a shoulder rest, but the neck should rest on the inside edge of your thumb.
A picture or video of what you are doing could be helpful.