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I've encountered a slight problem.

When I am using the ball, doing that palms up stretch roll, my left shoulder starts to feel sore as I extend my arm in front of me.

But the right shoulder is making a crinkly grinding noise when I move it, especially if I rotate it in a circle. The right shoulder doesn't hurt.

So, recap, left shoulder hurts but doesn't make noise when I extend it. Right shoulder makes noise but it doesn't hurt (it just sounds creepy).

These are both new. Is there something I can do for either?