Upper back pain—or, discomfort that can occur anywhere ... A strain can develop suddenly or over time and cause pain, swelling, muscle spasms, and difficulty moving the muscles in the affected ...

Whether it’s a dull ache or sharp spasm, pain between the shoulder blades can be caused by a variety of things. It can be due ...

shoulder and upper back muscles causes these muscles to tear (on a microscopic level). Your body tries to prevent this tearing by forcing these muscles to knot up. This results in muscle spasms.

It’s impossible to know whether the back pain Loutzenhiser felt was related to the tumor, but Molina suspects he had some muscle spasms and nerve ... incision on his upper back directly over ...