I have had muscle/joint pain in the shoulder, elbow, and wrist joints for about a year; then muscle rigidity in the neck, then intentional tremors, then muscle spasms. Most of these symptoms are on the left side of the body, with a few on the right. I have had blood tests done that found nothing. I had a brain MRI a few weeks ago and it was read as normal. There was something in the left cerebellum of the MRI that looked strangs to me but was not mentioned. I just wnated to know if it was something that I should get a second opinion on.