muscle spasm
"I have muscle spasms in my neck and upper back. I have bone spurs on my cervical spine that compress my spinal nerves causing numbness in my shoulders and arms. I have to hold my head in very specific positions to avoid pain and numbness. This causes tension and muscle spasms in my neck and back. My doctor prescribed 500mg tablets once a day at bedtime. I'm confident that I am under dosed. Not any relief at this point."