I don’t think movement could be bad unless you have a broken bone. Conversely, having any part of the body motionless will probably produce more tension and pain.

Any relaxation technique is helpful. I use Jacobson’s progressive muscular relaxation technique and then, I use visualisation with color to calm the part I have in pain. Of course, I take meds to help me.

But, what it works for me, doesn’t have to work for you.